Reversal still not done

On the 28 November an unauthorised debit order went off my account of R607. Due to the ***** that took place in my account in September I had stopped that debit order on my side via my bank and was paying via eft from September. I have been billed R99.99 for the unpaid debit and keep getting stupid automated calls from Vodacom everyday. 7the Dec I logged a dispute S3-9O78G-GGSH for the reversal of the R99.99 to this day it's still not been done and as always I have been calling Vodacom to follow up , all the agents see the dispute logged yet nothing has been done. What the hell is wrong it's been over 2 months for an error on yo damn side. I'm not supposed to be debited as I had placed a stop on the debit order via my bank on Sept already, Why was u being debited in Nov. I have been paying via eft since SEPTEMBER and speaking to the collections team I was promised that this amount WILL BE REVERSED AND I WON'T BE GETTING THESE CALLS !!! FIX THIS