Is your Battery fine, however it won’t move when placed on the ground. Does the wheels of the car spin normally when you take it up?
There are two answers to this dilemma, albeit they may not be the ones you were hoping for. Get separate batteries for the first one, it’s easiest. I experienced the same issue before, but I simply bought new batteries, and it fixed itself.
The second action is to return it since it needs to be fixed. Even when such toys are brand-new, this frequently occurs; they are frequently dropped, played with, etc. in retail settings.