Business ProfileforExpressway Mitsubishi

We purchased a 2018 Honda Civic from Expressway Mitsubishi fir $16500. They wrote up the loan for aprox $21000. We didnt catch it before signing and were taken advantage of. We also purchased an add-on glass coat protection package for approximately close tppr over $1000. We trusted them and sign the sakes contract. We were robbed but we signed it. I'm not sure if anything can be done a about that, although I'd like to see if there could be a refund. The one thing I know for sure we have a right to is the service we were charged for. We opted for the interior and exterior "glass coating" They first detail the car inside and out before applying a protective coating. We were promised someone from Expressway Mitsubishi service department would bring us a loaner while pick up our car, leaving us with a nice loaner vehicle (included in the prices) while they treated out car and brought it back. We were told to wait on an email when it was time to schedule the service. When the deal was signed, we never heard a word from them. We called and asked to speak to the sale rep we worked with. We were told he no longer worked there. We asked who we should talk to. We were given to the service department and when we asked when we could schedule this service, they first denied we purchased it. I read the itemized statement, and they then told us we were too far away to drive the loaner. We insisted on them keeping what we were promised. We were told to contact the head of service there and they'd have her call us. She never called. We tried and tried, left message after message. We were told we won't get a loaner at all. No one ever call back, never emailed. We left messages that agents wrote with me and my husband's phone and emails. We easy a complete refund of what we were charged plus $5000 compensation for our treatment and deceit