VODACOM *****ING MY MONEY! *********** PEOPLE!!

In November may account was paid double because I did an eft and Vodacom did a debitorder. I called them and they adviced me that I was in credit and did not have to pay for December which I did not. January I paid my normal amount R414.00 the same amount that was on my statement. Then I got my February statement saying that my amount due is R1342.88 and a letter with a different amount due R928.88 and they suspended my account!!! What the hell are these people doing??!! I call this *****ing!! I made 2 payments this month which I wasn't suppose to do because now I must be in credit again right? When you call them they keep telling you to phone a different apartment!!!