MRP mobile

I purchased a phone on Friday 19 June at MR Price in Market street. the phone is giving me problems and I went to the store to exchange the phone but they say the phone need to go for assessment for an exchange. The consult told me that I can go to any Vodacom store if I have a problem with the phones or exchange. she never said I wont be able to return the phone if I have problems with it. I am so disappointed with MRP service they only care about the sales not the customer. this lady said the manager will call me but she never called, she just send an sms with wrong info that the phone wont be exchanged. so I'm stucked with a super slow phone with a blurry camera.