Disgruntled customer

On the first of March my debit order was suppose to go off of R129, mainly because I received a credit due to being over charged by vodacom in December and January. On the second of March I became aware the payment hasn't gone through, I immediately made payment to which the payment was acknowledged. I then saw my invoice for the next month is at R339, again I was over charged, I enquired by your consultants and was given the incorrect information and I was repeatedly told I will only pay R238. 99 even though I made the consultant aware of the R339. I was then later told that I was being charged a penalty fee of R100. 88 and the consultant changed her story from the R238. 99 to R339. I would have understood if the penalty fee was because I paid a week later, but I literally paid a day later due to a slip up in the account. I escalated the matter and spoke with the team leader of the consultant and she did not sound at all interested in my problem and came to no resolution. I am due for an upgrade soon and I will not be taking the upgrade due to the unprofessional treatment I've been receiving from vodacom, I am not happy at all.