Poor, disgusting service from Vodacom

My fathers contract account has been in arrears for a few months and that's mainly because vodacom has failed to debit the monthly installment as agree since the beginning of the contract. They blocked his account without having attempted to let him know that they haven't been receiving any payments for the last couple of months and he didn't know that they were not debiting. Okay so Saturday, the 28th of March I paid off the outstanding balance and contacted customer service to find out if the money was received on Sunday and the lady I spoke to told me to call Collections to find out if it has cleared or not the next day which is Monday and I did. The lady I spoke to on Monday confirmed that the payment was made and told me to wait for 2-5 hours and the phone will be active again of which I did but still nothing. I called again on Tuesday and spoke to a lady called Cassandra, she told me that the request was not processed and that she'll do it again and I needed to wait for another 2 hours of which I did and ended up waiting for 5 hours. 5 hours later, I called again and spoke to a gentleman, Kabelo who then told me that the request was made by Cassandra and I needed to wait for about 24 hours. It's been more than 24 hours now and no one is saying anything. I tried calling again today, both the Customer Care Centre and Collections department but I can't seem to get through. I am not sure if they block me or what but I am really upset. I'm an uninformed client and have every right to be upset because this was never our fault from the first place.