Blu Vivo XL2 stuck in the selfie mode upside down.

[Kb Calib]

I have a Blu Vivo XL2. Over a week ago I dropped the phone and the screen cracked but I was still able to take pictures with both front and back. Two days ago I took the phone to a repair shop for a new screen. After I got the phone back it's been stuck in the selfie mode upside down. The icon to toggle the front and back cameras some have got disabled and I have no way to use the back camera. Any help is appreciated.