The FCC is usually not interested in solving unintentional or accidental interference. However they do occasionally assist in rectifying harmful interference. It is rare that they will get involved in an amateur radio interference complaint unless the offended amateur radio community has already done a lot of the work themselves. Form your own transmitter hunt. If possible, buy direction-finding equipment.
Many clubs own direction-finding equipment for fox hunts and interference solving.
Try to solve the interference yourself before contacting others for help. Remember that SERA has no enforcement powers, but your coordinator may be able to help you by supplying telephone numbers and addresses of individuals. The coordinator may also be able to help you in other ways. Remember that the repeater which has the older coordination date rightfully has the upper hand in an interference complaint which involves repeaters and repeater users. Remember that the offender in most repeater complaints is the user, not the repeater.