BAD SERVICE EVER

I send my phone Samsung S5 for repair in Menlyn branch on 16/06/15 to date no phone. When I enquire about it on 01/08/15 because it was already 2 months then the agents told me that they didn't receive the payment of R605.00 that i paid through EFT on 27/07/15. The agent requested the POP which I did, then on the 07/08/15 the agent told me that my phone has already been dispatched to Menlyn branch for collection. When I get to Menlyn the phone was still not repaired and the agent Thato said is because of the payment of R605.00,I told her that I did send proof of payment. Then she booked it again for repair and my Ref is TRJ006097. I have paid all the money in July and we are in September still not having my phone but my monthly installment is being taken even though I don't have the phone. I want my phone at the end of this week, I have been treated unfairly for the past three months. I want my phone