VODACOM KEEP DEBITING EVEN AFTER SETTLEMENTS

I have asked Vodacom to give me a settlement in the beginning of October 2018 and they did and I paid on the 4th October the settlement amounts. I did sent them the proof of payments and my accounts were closed. Now in November 2018 Vodacom is debiting my account, although they confirmed that the accounts were closed and settled through the calls I made. Vodacom after my settlements they did cut my services now they are charging me the services that they didn't give me. I have reversed the debit order but Vodacom insist that I awe them money. I feel that Vodacom is taking me chances here. they are bridging our agreement as I believe that a settlement is a settlement they never told me about the exclusions on the settlement.