Shocked at complete disregard for communication!

I received 3 massive data bills from Vodacom which I tried to fight for months and eventually gave up on and agreed to paid. However because of the amount I would not have been able to pay it all at once, I therefore phone the accounts department to make arrangements to pay R2000 a month until paid up. In the conversation I had with the them I stipulated that they can keep the phone on a soft lock until paid up as I am not interested in using Vodacom ever again but it was important for me to be able to at least receive calls. November I paid,December i was late with a payment, so I phoned Vodacom to advise that I will be paying the amount that was due in a couple of days and the rest at the end of Jan only to be told that my number had been DELETED!Got transferred to the accounts department only to be advised that I have to pay the FULL outstanding amount upfront for my number to be reinstated. R5500 No phone call to advise me NOTHING! I could not pay that amount there and then and so said I would pay it month end the.This morning i find a debit for R450?Where is communication? I feel so helpless dealing with Vodacom. They're so quick selling but noone cares after that. IM DO DONE!