Vodacom poor service

I***-6 I have been with Vodacom for many years and I can't even begin to count how many contracts I had with them. Recently, my last contract ended with Vodacom and I was convinced to upgrade or take another contract (business as usual) and I did. To my surprise, in December I received a call saying that I skipped 3 months' payments, I asked how is that possible because Vodacom debits from my account. I do not usually check the statement on the bank account that I am using for debit orders unless there is any debit that didn't go through and I got notified. I was then told that there was a system error and it had been set as a manual payment which was not my fault, I informed the consultant that this was inconvenient and asked if they please fix that and continue with the debit order option and the answer was yes. I paid that amount for 3 months and went to Eastrand Mall Vodacom to verify if a debit was set and they said it was set. Now I get a notification email that I skipped my payments and that further actions will be taken. I am so disappointed, this is not what I was expecting after so many years and the fact that I was convinced to take a contract that I didn't even need in the name of "keeping your profile active". I request that all the amount outstanding be added at the end of the contract and Vodacom continue to debit as arranged or else cancel the contract and I return the tablet.