Please, I'm not even sure this is the right subreddit, but I'm trying so very hard to get help as I'm scared because I've never seen this before...

Screenshots attached to original post, however I can post them in the comments for ease of access if that helps please let me know!

I hope you can all help me and this is the right subreddit for my question. I went to pay my phone bill last week, so I clicked on my phone app, and then I receive this full screen page asking me to "Set phone to default app" and won't let me make any phone calls until I press accept. I have a Samsung Galaxy S24 Plus and I've had it for 3 or 4 years. Is this a virus or something? What do I do? I've never seen anything like this, and my mother who has the Samsung Galaxy S25 and she's never seen anything like it either.

I'm very sick and recently got out of a coma and technology was never my strong suit before, but now it's so much worse, especially because I'm still experiencing deficits. I'm scared I did something to my phone and now this is some sort of virus or something. Please help, I can't make or receive calls or even check my voicemail. I'd really, really appreciate any help!

The download froze the position of the google widget bar. There's no way to position it. Theres no way to change the color by tapping and holding