Horrible Service! Issue still pending AFTER A YEAR

I purchased a wifi router from Telkom Mobile in Centurion Mall in December 2013. After 5 months the router stopped working. I took it back to them. I did not have my slip so I said would pay for repairs even though it's still under warranty. After a week I got the quote of R180. I immediately paid and send the proof of payment. After months of no response and no one at the branch that could give me any answers, they finally told me IN NOVEMBER after I had to visit the store AGAIN that they never got my proof of payment. Again I send it. AGAIN no response or reply, UNTIL I HAD TO FOLLOW UP, and then I was told the device is missing and they will refund me and give me another device. After taking my bank details to the people in Telkom Mobile on two occasions, because apparently the first time they lost it, I was again **** to saying that it will be refunded within 7 days. This was in April. Still no response from anyone. Ive remained patient and calm, lost my temper, tried everything. Each time I go to the store I get new lies about how they'll call me back and how they will make this a priority. A YEAR TO SORT OUT THIS STILL UNRESOLVED MATTER! I WANT MY ROUTER AND MY MONEY!