VERY BAD SERVICE!!!!

After having the WORST customer service at both branches in Kolonnade trying to pay my account I laid a complaint at Vodacom. After speaking to a lady named Waseema Marten she said that can just pay my account via EFT and send Proof of payment to their customer service which I did. 4 days after I paid the account I got an sms to say that Vodacom is trying to take my money. fortunately I did not have enough money in my account But I am being billed for unpaid fees and transaction fees. After sending three emails three days apart to Waseema I got no response. Calling again the customer service I spoke to the Supervisor Ernest who took 30 minutes to understand me he eventually said he will log a complaint and someone will come back to me. It is now 7 days and again no response. What do I have to do to get this sorted out. Sending emails, calling, going to pathetic stores and logging complaints is not working. Should I close my account and move to another service provider? I am disgusted with this service.