yar listen, no need of being stressed now. What's done is done now. What you can do now is to get a duplicate book (can't tell the cost of getting it, as I don't know your city). Use the car as much as your want, use this car for atleast 10 years, get enough profit from it from Careem. After 5-10 years, sell it to someone in your friend/family circle. The value of the car will depreciate, but don't stress for just 50-70k. If you sell it in your friend/family circle then there is a possibility that you won't bear much loss.
You are just in the start of your professional career I guess, so don't stress too much. Life isn't fair. You have to adjust your attitude towards the happenings in your life. Consider it Allah ki razaa and thank him for whatever he has given to you and move on.