Not happy with accounts department

I am highly disgusted by the accounts department, I made arrangements last year to pay my account which I did. Up to today they are still sending me account statements saying I am in arrears. I have spoken to multiple ppl over the phone and at the gym itself, all they say is it will be sorted out. Yet I am still getting notifications saying I am in arrears. This is totally unacceptable, I want my account closed reflecting R0 owing!!!!!! I stayed true to the agreement I had with virgin active, yet they are still trying to ***** me out of more money