VEHICLE WITH UNPAID TRAFFIC FINES

I bought a used vehicle on the 29th of November 2013 from this branch. To my surprise, about a month ago when I was trying to trade in this vehicle, I discovered to my horror that this vehicle had traffic fines dating back to 2011 / 2012, periods way before I bought the vehicle. On Sat the 14th of November 2015 I went there to query this. A Sales Manager named Carl Kumst undertook to resolve this issue for me or at least get back to me over what the way forward should be but now almost 2 weeks later when call I still get sent from pillar to post because apparently there's no one to attend to my query and I should leave my contact details so that Karen is going to call me. Nothing has happened since. What I would like to know is HOW THE HELL DOES A COMPANY LIKE MCCARTHY SELL A VEHICLE WITH UNPAID TRAFFIC FINES? When I tell them about it they seem not to have a clue how this happened or can be resolved. Right now I'm downright appalled and disgusted that because someone didn't do their job at Mccarthy now I have to go thorough all this!