VODACOM AFTERSALES PATHETIC AND USELESS

Last year September I took out a new contract, when the phone arrived, I did not like the phone and returned it within 14 days as the terms and conditions state and I requested to cancel the contract! Up to this point, they are deducting money off my account for the contract which is R899 per month!! The problem is I have two other contracts and if I don't pay one line they cut all my phones off!! I have phoned several times as well as went to the branch only to be told they cant assist me cause I ordered online! Please sort this out and credit my account! I have 3 witnesses that the phone was picked up by RAM, including camera footage, as per Vodacom, the device was never picked up! Please sort this out, I want all those amounts credited to my account!!