Refurbished phone problematic

On 14/11/2015 my Blackberry Z10 was booked in for repairs at Edgars Pavilion. A week later I received a call to advise that the phone was ready for collection. I did inquire if the phone was sorted and the reply was, Yes. When I did go into the store on 28/11/2015, I was told that the phone could not be fixed (no reason / report provided) and I was provided with a refurbished phone. I was not too happy with this but nevertheless I accepted the phone. The phone provided to me is in very condition but unfortunately it is not working as desired. The battery is running down very quickly (even though I gave it a full charge and did not use it). <br> I even purchased a new genuine battery and I am having the same problem. I am fully aware of the battery life on this phone as I did have the same type of phone previously. also, the phone reboots on its own and the camera takes out blurry pictures. I am utterly disappointed. I would like this matter to be addressed. I cannot keep on making unnecessary trips to the store and stand in queues only to be provided with defective products. Its either that my original phone is fixed or I be provided with a brand new one.