Phone repair problems

My Sony Xperia M5 Dual had been sent in for repairs on the 08-03-2016, I had received the phone back on 30-03-2016. The phone had kept restarting, I had received the phone and now it appears that the Accelerometer does not work and the phone cannot change from portrait to landscape mode. I am disappointed with this service in that the phone gets fixed but another part of the phone stops working. Will this also mean I have to wait another 3 weeks for repairs while using my own phone?