We bought my daughter a new 21 Venue Denim last year. It currently has 4,000 miles on it. My daughter went today to get gas for her car and the fuel tank door wouldn't pop open. The lever that pops the door open no longer seems to work. Has anyone else had this issue and, if so, what was the problem? Dealer said they never heard of this before and she would have to drop the car off for a few days. Trying to avoid leaving it if it's an easy fix.