Bad After Sales Service

Bought a Mobicell phone@Foschini Blue Route in March.The phone was giving problems and was sent away only to come back worse and with more problems.Its sent away 3 times and still issues not resolved.The salesman Sino tried to resolve it with Mobicell and promised he wud make sure we satisfied with the outcome.We are not,it is now November and my wife stil without a fone.I dnt want the fone any longer as my wife didn't even have more than a month's proper use of the fone.I have been a loyal customer to Foschini for a decade now and have never experienced this before.And now they say we have to use the fone again and use it til it has problems again....Why?The device was problematic to begin with.And who is Gona reimburse me for my petrol to drive up and down to the mall,It's frustrating....