cancelled but still debit my account with penalty

Good day, I would like to lay my query about vodacom and the consultants that are not so helpful. on the 15/05/15 i call vodacom as they debited me the amount we didnt agree on and even didn't even give me what i order. i then asked them to cancel the contract but still not done. and continued to debit my account including penalties. the last person i spoke to today is Ayanda who just left me without helping out. herewith the Names of the people i spoke to from the first (Vusi, Martin, Palesa, Tebogo, Jabulile, Tersta and Ayanda) all these people didnt even give reference, Jabullile said she will email it and didnt.