Bad service from MTN repairs

SAMSUNG GALAXY POCKET was bought in October 2014 at PEP HOME in PROTEA GLEN MALL and is under WARRANTY for 1 year. <br> <br> The device has audio failure on speaker \receiver". There's a dead sound on the caller side. Proof of Purchase was in October 2014 and attached to the Technical Fault Report that was on the 02/01/2015 <br> <br> My problem is MTN wants us to pay 330 for the fault. This is not possible as the warranty stipulate that if the device is still under warranty it must be fixed by the Shop where it was purchased.<br> <br> According to MTN they say the device has physical damage (crack) that is not possible because when we gave PEP STORE the phone was not damaged. .<br> <br> In this case what must be done. Is been 2 months now without the phone."""