I feel like I'm being scammed!!

I called to cancel my Xfinity Mobile since Aug 2024. I was still charged $39.39 in Sept. so I then called for a refund (which I didn't recieve) and to close the account again. I was charged again in Oct. in the amount of $39.62. I called AGAIN to get the account closed AGAIN and for the refunds. I recieved only one payment of $39.00 and $33.00 which isn't the amount I was charged but being so miniscule I was just glad the account was closed. Now in Nov., I get an email saying I am $72 PAST DUE and will be charged $10 again. Calling customer support three times for the problem to continue and get worse everytime is not working and I am forced to file complaints until this is rectified.