Charged serval months after cancellation

It has been an ongoing battle. 
I cancelled all services back in March of 2026.

I was charged after returning equipment.  
The following month I was charged.

one phone call and it was resolved. 
next month I was charged. 
another phone call and it was resolved with a refund. 
the following month ANOTHER charge. 
phone call, resolved with a refund and reassurance I would NOT be charged again. 
month after that, charged again. 
They gave me the run around that it was a service date delay or something, another refund, talking to several people saying I would NOT be charged again and confirmed everything has been cancelled and there are no more charges coming out. 
guess what happened this morning?

an unexpected $155 charge with the same run around saying it was the service dates. 
BEYOND frustrating. Now they’re not offering a refund nor the overdraft fee I was charged because of Xfinitys garage. 
Idk what to do, but if I ever live in a Xfinity serviced area, you get bet your bottom dollar I will not be returning.