Xfinity won't fix the problem with Samsung galaxy A25

I have issues with the Samsung Galaxy A25 over a year, then calling up on the phone for hours hours troubleshooting.Nothing works loses.The signal doesn't connect to the internet won't connect to Wi-Fi, lose gps.When i'm driving i had two lines because they offered a free line  then I ended up paying for it because I wanted to back up because other one wasn't working.My bill was $17 a month.Now it's over a $100 I Canceled my second line the beginning  of January and they're still charging me for 2 lines. And still having issues with the phone that won't connect to the internet.or wifi and I'm not the only one having problems. Everyone is and the phone isn't compatible with the xfinity network, but they sold it to me. So my deal just keeps going up-and-up and they will not give me a credit, but the warranties through anything state you do not have to pay for a service if it doesn't work, this company needs to be accountable for their actions. They do nothing but keep you on the phone for hours.  From one\n Age to another, then you get disconnected. And they never cut you back like they don't have your phone number, then they keep your credit card on file which is wrong because they had a breach. They\n 'Ve gone into an old bank account 3 times of mine when I tell them not to and it's cost me money.