Bad service

I bought a phone last year around November,then around April my phone decided to just switch off and doesn't want to switch on ,so I took the phone at the Store which is Dunns for it to be fixed or replaced ,I got a call few weeks later that they can't fix the phone because the phone screen is cracked okay I had no problem with that ,I was asked to pay three hundred and something but I remember it was equivalent to four thousand rand then I told no its fine don't fix it but can you please return the phone to shop ,they were like "did they tell you at the shop that you have to pay a rejection fee if you don't agree with our quotation, I was like no ,then I was told to pay that rejection fee which was R395 but when i got to the store I was told to pay R370 then I paid ,two weeks past without the phone being returned to shop ,I then inquired with one of the staff members they told me that they'll do a follow up with the whereabouts of the phone it's been two weeks still without the phone being returned and in all its like 3 months and few weeks without my phone