i DID a reverse charge recently from some crap place.. (not car related), was not hard, just show you were right and they were wrong.. and all done online.. I would imagine it was not cheap for your parts and the aggrevation sucks but if it was by C.C. all wil be well..
BMW 2001 530i (E39)
1993 Toyota Camry LE (Daughter uses it for college).