New phone not working, not refunded or replaced

I bought a Mobicel Titan at Foschini store in Queenstown Eastern Cape for R1299 on Thursday 21 January. I came to jhb. And on Monday night I charged the phone for the whole night. When I removed the charger in the morning it showed 100% but when I switched it on it showed 46%. The following day I charged it again and it was full but went of at 38% and when I switched it on it showed 98% which counted down to 0% in less the 5 minutes. Then it took me about 30 minutes for it to charge again and when it did it was on 28%. I can't answer any calls bcoz every time a call comes through the screen freezes. I got a call from their call center and I explained what was happening and they said I should take it to any Foschini store bcoz it still has the 7 days guarantee and they'll exchange it for a new phone. I took it to Foschini store festival mall they said they have never had that kind of a phone and they can't help me. They said I must go to Maponya mall or Sandton Foschini which takes me about 3 takes to get there bcoz I stay in Tembisa. I don't have money for taxi it's not month end yet and now I'm stuck with a useless phone that I still have to pay for.