Got debited again after contract cancelled

how the hell does a person get to resolve this matter... this is my ****** THIRD complaint... my ****** account keeps being debited. The contract expired end of July due to your stupid strike we are suffering. i didnt upgrade and had been telling mtn i dont want to and was told come end of june no july no we dont do it at the branch braamfontein call mtn did so but with no luck. got a response from hello peter no more deductions but guess what my account got f*cken debited again... what the hell should i do now... u not ****** helping damn ****ed and irate......