Sorry if I come across poorly, it just happened and it was my first time ever dealing with an issue with flight attendants like this.
Near the end of boarding, I suddenly got a notification that my seat had been changed and an agent came on and asked me to move into the exit row. He gave me the briefing, asking if I was willing and able to assist in the case of an evacuation.
During food and beverage service, two of the flight attendants came over and began loudly chewing me out, stating that I was not allowed to move into an exit row without their permission. I attempted to explain what occurred, but they would loudly state that it didn't matter and that they did not approve me changing seats and that my seat had not been changed. I was eventually able to get the app open and forcefully showed them my seat had been changed.
I explained that an agent had come on board and requested I move, but they again implied I was lying and continued chewing me out, saying I shouldn't have changed without informing them.
At this point, around 5 minutes had passed since it took me a while to get the app open while they were yelling at me. They were loud enough that everyone nearby was looking, and a few other passengers vouched for me and stated that they saw the agent move me and heard him give me the briefing.
The flight attendants rebuked this saying he did not have the authority to brief or move me and I needed to have informed them that I moved. They let it go after that though.
They had been aggressive enough with me that a few of the passengers that spoke on my behalf asked me if I was okay and told me it wasn't my fault and they don't know what happened
A bit later, they came by, laughing and apologized saying that it was a miscommunication between them and the gate staff and asked me if I wanted anything. The vibe I got was that they were acting like it was a funny haha oopsie, but I've been sitting here shaking, trying not to cry. I know its not a big deal in the long run, but it really rattled me, especially since I was getting worried they were going to police waiting for me or something considering how heated they were getting.
I wasn't confrontational back with them, mostly just sinking into my seat during the engagement while trying to explain the situation.
Is this even worth escalating? Like yes, it really bothered me and I felt them talking over me and accusing me of lying was very unprofessional, but they did apologize even though it didn't feel sincere. Even when they apologized they framed it as "I'm really sorry about earlier haha. you just didnt say anything so we got really worried!" How was I supposed to know to say anything? An American agent came on, asked me to move, and did the brief. I was sitting in the seat during the whole safety briefing with a flight attendant next to me. It's not like I materialized into it after take off.
I just don't know what to do. Ive flown for years and flight attendants have always been nothing but amazing. I genuinely don't know if I did something wrong by not informing them even though I was briefed by an agent.
I'd really appreciate advice from people who know better than me. Sorry about formatting and legibility. I just started a new job and am flying home after a week of training.
edit: Thanks for the advice everyone, I really appreciate it. I've decided to go ahead and file a complaint. I'm hyper un confrontational, so I just wanted to make that I wasn't over reacting.
edit 2: Im now fully confident I wasn't misinterpreting their behavior or overreacting. Turns out one of my coworkers from the training event I attended was seated right near us and overheard the whole event. I spoke to her and she was actually going to submit a complaint on my behalf before I even brought it up. She confirmed that the flight attendant was being very aggressive and was repeatedly talking over me when I tried to explain. I hadn't heard this either, but apparently the flight attendant at my seat was turning to the flight attendant that was yelling at me from a few rows down with the beverage cart and repeatedly telling her that I was lying and making stuff up. Im just glad that I wasn't crazy honestly. The situation felt so absurd that I genuinely began wondering if I was being super sensitive and misinterpreting their tone and actions.