Hyundai City

bought a 2013 Equus in April and while I love the car - I have been underwhelmed by the service and support afterwards. While I got past some confusion and delays in getting my tags [they don't seem to know how to process out of state buyers???] the one problem I can't get past is they've overcharged me for my tags and no one will call me back or email me back >> dozens of emails and calls either get no response or the "...let me check into and I will get back to you response" and I'm several months into the process with no answer or follow up >> just horrible - - and they owe me ~$150.