Hello can someone please help. I crashed aircraft fell 20 feet nothing broke at least what I can see. Now I can't link controller and I tried binding it and it didn't work.

Sorry about your crash. Which aircraft do you have?
The linking process is in the app (Academy section, graduation hat from the home page)
If the linking/re-binding procedures will not work then your crash has damaged something and you would need to send it in for repair.

Probably the transmitter in drone is damaged, you need to send it for repair. Send an email to support@dji.com and we'll help you with it.

Any idea on price for that ball park.