Mall of Georgia Dodge False advertising. Didn't get what was advertised. Buford, Georgia

I purchased a used vehicle from Mall of Georgia Dodge. The internet listing clearly stated that the purchase included a free 12 month subscription to Sirius satellite radio. When filling out paperwork, I was presented with a "we owe" form that stated they owed nothing additional. I questioned regarding the Sirius service and was told that if it was on the listing, it was automatically included and wasn't an "add on." 
30 days after my purchase, my satellite service was stopped. I sent an e-mail to Mall of Georgia Dodge and was told by Internet Manager Kevin Tobin that the Sirius subscription only applied to new cars, and if it was still connected on a used car, it would only stay in service until the end of the "original" contract. This is absolutely NOT what the listing said. Kevin said that I should feel free to contact Sirius on my own and have the service reconnected.
I went on the Mall of Georgia Dodge website and found that used vehicles on the website still said that they include a 12 month free subscription to Sirius. I copied and pasted one of these listings and replied to Kevin Tobin, but have not heard anything more from them. 
My complaint really has nothing to do with the cost...it has to do with the principle that they are not giving the customer what is advertised.  I just want what I feel I am owed.