Refund and poor service

I called Vodacom Cancellation department as they were debiting my account but I do not have a contract with them..I have called several times to request to stop debiting and refund all the instalments that they have deducted before but to no avail.I then called in March and Spoke to Patricia Ntuli who was very rude and not willing to assist ,she said the contract is cancelled and i will get my refund but i need to send my bankstatement.I requested her to send me the email as i had nothing to write with or an sms and she said she dont have access,i requested her to ask her supervisor to send me the email and she said she is not allowed to ask her supervisor to send sms's to customer ,I told her i held on for 20 mins to get assisted finally i got through to a consultant and still i cant be assisted .she then advised she will call me the following day the latest 9am which should have been ob the 18 March 2015 but she ddnt .Im not a vodacom customer so its difficult to get through i have to borrow fones form vodacom customers and still dont get assistance.Im still waiting for my refund .I have also logged a complaint on their website but still have not recived feedback.Iwant my refund