Practically *****ing my money by making them impossible to deal with

We have been dealing with the call centre and cancelled our contract even paying a cancellation fee. Just got another bill from them and called in. Apparently we have not cancelled anything with them.

The call centre staff are not equipped to deal with this type of thing and getting it escalated is near impossible.

I would like to be contacted by someone that can help me.

I've resorted to coming to this site because I'm at my wits end with this situation and am hoping they may take their customer service a little bit seriously now.