PATHETIC service

I contacted Vodacom on 18 April to change my debit order date from the 25ht to the last day of the month. Since the last day of April falls on a Saturday my debit order was suppose to be 3 May - this was done via the TOBI WhatsApp robot. A Vodacom representative phoned me after making this arrangement and confirmed my debit order date. 4 May comes - no debit order went off. I phone and since I phoned "after 12pm" the debit order can only go off 5 May. 5 May comes - no debit order went off. I phone and since I phoned "after 12pm" the debit order can only go off 6 May. 6 May comes - I phone 1pm as my debit order still did not go off, explain to the lady the whole history of the debit order and phoning Vodacom only to be told I had to make proper arrangements and if the debit order did not go through I will pay penalties!! And every time I phoned and had to go through the long pre-voice recording **** the system say my account is in arrears!!!! I have been with Vodacom for many many years but this is totally unacceptable. PATHETIC to be exact.