I took my car Iin to have a dash camera installed....

I took my car Iin to have a dash camera installed. The dash camera bundle included a front and rear camera. I took the car in on Thursday and got it back on Monday. I was told, I will have to install the rear camera. No one explained anything. I do not know if the memory card was installed and the front camera does not appear to work without the rear camera being connected. I will not return to Legacy.