VODACOM OVER DEDUCTING R248 FREQUENTLY

Hi, I have a serious problem over her with Vodacom, I bought a phone on contract in March 2018, and on my very first deduction, they over deducted an amount of R248, and they then sent it back after a long agonising fight I had with them, as per our agreement and monthly statements and invoices, the deduction is actually R182. On the 25th September, they deducted R428, and not R182... I made calls and they acknowledged the error and requested that I send my proof of payment, and I did, on the 28th September. Today is the 11th October, nothing has been done. May I also indicate that on the 10 October I made a call to Vodacom and they promised to call me today, the 11th October, still waiting!

I am so disappointed and unimpressed with Vodacom. I don't know what to do. This is on going and I don't know what to do at this point.