TWENTY FIVE MONTHS IN 2 YEAR CONTRACT

I have been trying for days for Vodacom to correct my statement!! I have been charged TWENTY FIVE months instead of TWENTY FOUR which has been proven to be difficult to comprehend!! I was told that May would be the last month that I would pay of my contract only to be told that JUNE is!!! Next month Ill get some *** story that July is the last month!! R499 was deducted instead of R99.00 for my new contract! It is my 25th month and it is clearly on your statement that you have made TWENTY FIVE deductions!!!! This situation is really making me angry because every month I need to sit on the phone with Vodacom to resolve something!