My rear camera and flash isn’t working after I dropped it by mistake.

I dropped my phone 7 Plus recently and after figuring out everything, I got to know that my rear camera isn’t working. The front camera works perfectly fine but the rear doesn’t… It works when I click to “x2” zoom in option but that’s it … And now even the flash isn’t working .. Normal camera and the flash aside … both not working at all … if I need an replacement thn how much will it cost indian rupees ? Anyone can just tell me the cost? Apple store costs way to expensive ….normal in a local store how much ?