Mody,
 Sorry to hear about your crashes. While they are hard to accept they are part of the hobby though.

I do have on concern. Reusing the receivers without having them checked out. A receiver can easily be damaged in a crash, and many times that damage does not show itself until the plane is subjected to stresses and vibration in flight, this means the receiver may appear to work on the ground but once it's in the air it will fail. Especially if the crash was enough to snap the cover off of the receiver it could have easily damaged the receiver elements as well. Your best bet is to send the receiver in and have it checked before you use it in a plane again. After any crash I always send the receiver in for service before I'll ever use it in a plane again.

Ken