I have 2 - 07 Santa Fe's. Both have a problem with the snap in portion of the seat belt, on the passenger side rear seat. Rather than rigidly sitting up so the belt can be inserted, they must be held in place while inserting the belt. One of them has now found itself deeply buried below the seat level. I've tried to extract it with needle nosed pliers but have been unsuccessful so far. Isn't there some mechanism that is supposed to hold the receptors in place while inserting the seat belt??? How can I get the buried receptor back to an usable position?? Thanks, Jim