I would send it back and send it back by using their fed ex acct #. I also would charge again for presenting the instruments each time it comes back. I agree with your attempt to repair it for a fee. If these companies were to check their fed ex bills and see how many times an instrument was returned. They would find it cheaper to pay us to fix it the first time around.
I just recently recieved a mortgage to record however it was not in RECORDABLE FORM. We called  and they said send it back.  We than asked for the Fed ex #. They said no that they changed their policy. Due to it being abused. My ? who is abusing it us or the person preparing the papers?
                                           Mason