Waiting for 2 weeks for refund to be done!

Firstly i called Vodacom on the 5th of August telling them that I paid R 600 over to them and they also debited my account for the installment, they said they can see that the R 600 is on the account and i will get a call back within 48 hours which never happened. I then get a sms saying i must fax my proof of payment which i didn't cause i don't have a fax but did call them back to confirm a email address that i can send it to as. ( for what i don't understand cause they confirmed they can see the payment ) on the 9th of August i call them back and confirmed that i haven't received any call back! They said they cancelled the refund because i didn't send the proof of payment which i confirmed the lady i spoke to gave me the wrong email address, i then got the correct email and send through the proof. I got an sms this morning stating they still haven't received any proof of payment i send it through again and also called them again to confirm i have send it through 3 times already. I spoke to a lady at accounts department to confirm again she can see the R600 and i need to send the proof again to the email address. I asked the lady for the team leaders email which she said she cant