Bad service and poor customer service

I had a contract with vodacom for 20mbp LTE 4G had really bad service for almost 9 months straight the never bothered about the fact that my service was poor so I logged a complaint with ICASA and my contract was terminated I had to pay a last fee of R 116.52 but not even the customer service was sure about the amount so I paid R 117 literally the very next day they debited my account with R 116.52 and still refuse to pay back my R 117 that I initially paid