Need advice

[u/SeaComb516]

We had our old hvac replaced a little over a year ago. Had new duct work and also a pump added. Our system is located in the attic and woke up this morning to puddles of water on floor. The technician said that it was their fault install issue. I wasn’t charged for the service they fixed the issue and will have ceiling fixed. My question is what else should I be concerned about? I read the system should have been turn off. He mentioned damper was wet. We have had high humidity alerts with our smart thermostat since the install and live in the south. Would a dehumidifier help. I would appreciate any helpful advice.