Vodacom causing me massive inconvenience and stress due to Mistake on their behalf

I have been a Vodacom customer for more that 15 years. But seriously considering to take my business elsewhere after the following trauma experienced due to their unprofessional service . I am very annoyed with Vodacom because they have stopped my debit order without any communication and I was unaware that my monthly billing accumulated because of this error from Vodacom. The first time I realised I had outstanding amounts was when they suspended my account, also without any communication or warning. After trying very hard I finally found a dedicated consultant to handle my case. Vodacom admitted that if was their error, apologised and asked me what I suggest? I requested that they waive all arrears and re-activate my account. I received an email that my account was credited and line activated again. I understood that the matter was resolved until HP attorney started sending me sms that I need to pay arrears or further action will be taken. So it seems that Vodacom only partially credited my account and I am still battling to resolve this matter. I see this as ********** business behaviour and this is causing me unnecessary stress and inconvenience due to a Vodacoms mistake.