still paying even after contract was cancelled

I sent Cellc a email to cancel my contract. Because i work out of country i had to email. They rep**** to say that i have another month left before i can cancel. After another month i sent another email. I also phoned Cellc and they said it is cancelled but still they debit money out of my account. This has been going on for atleast 4 months now. They Debit R110 out of my account and i dont know what for as my contract was R389. I have sent 2 more complaints since november and recieve incident numbers and they say someone will contact me but i am still waiting. I even stopped the Debit order of R110 with FNB but this month Cellc made the debit R118 , and then it went through. I am really really unhappy and i want all the money they basicly stole from me back in my account. Poor service