Unacceptable service

I have been a loyal customers with Vodacom for many years. The service is absolutely pathetic to say the least. For a week and numerous wasting my time phone calls to cancel my existing contract is to no avail. 1st of all they say my account is in arrears which it is not and after speaking to the accounts department and confirming it is not in arrears and she will update the system it still shows un arrears on their side unabling me to cancel my contract. This behaviour and ignorance on the side of their employees is to say the least frustrating, unacceptable and unprofessional. I will now cancel all my contracts with them as they come up due to poor service.