MRPRICE PARYS

I bought a phone at mr price in parys in January Mobicel IXplus The phone worked good Then it didn't want to switch off I left it and went off on it's own Then about 4-5 months in it didn't want to switch on I gave it back and they send it in Came back not even a month of being fixed it did the same thing they told me they can't give my money back or a new phone They must send it back for repairs What can I do?