We buy cars

Bought a bmw e46 from we buy cars riverhorse But the battery was dead .so boosted the car it started.but after idling the car the battery has not retained charge .asked we buy cars for a good battery since I paid for the car in cash and was not given the car for free.qas told since it is a category b vehicle they can't assist. So because u buy a cheap car u won't be treated like other customers at we buy cars .and to get a salesman to help is another issue at riverhorse branch