Bad arrogant service ever

I canceled my contract in May in the store at mall at carnival and I was told that everything was done and my account was canceled but telkom kept sending me invoices that I must pa. Today I called telkom and spoke to sindiswa asking her why I still have to pay while I closed my account and she said it's because I didn't follow the correct procedure and I told her that it wasn't my fault because in the branch they said my account is closed and she had the nerve to tell me that it's my fault I didn't read my contract and if I do not want to pay it's fine I am the one whose going to be blacklisted. There is no #WIN with telkom