H&R Auto Dealer sam sold a defected car with hidden problems, its at VW an thay want 3200 to fix.. fremont California

To whom it may concern,

My son bought a 2004 VW Toureg with a riged ingnition.. the car was running fine. my son lost the key, so we had it towed to Bob lewis VW in san jose. to get a new key programed, They told me that to car had been riged to start, an that it was dead computer could not program a new key, now VW wants me to pay 3400 to put in some computer parts, an that might not fix it... i called to H&R dealership, an thay did not look over the car before they sold my son a bad car,, They did not provide a work history of the car an is u willing to hapl this situation out. Please advise on what we can do... My son got taken by a scamer.