Bad service

Requested beginning of Nov 18 for Business line to be moved to new premises.. never happened. Got fed-up and asked for cancellation of line.. numerous mails, phone calls all ends up in ‘no response’ or being cutt off while on the line. In store I was told cancellation must be done online... just to try numerous times.. but constantly being blocked.. or left hanging online. Needless to say, no response, but the bills are coming!!! Don’t even have the landline since end Nov 18!