Hi, I bought a MN82 RC car model in October, used it only a couple of times, it is draining the batteries to the point of them being unusable even when the car is switched off. I consider this to be an electrical fault on the car. I am well past the 30 return period for online purchases, however I believe this should fall under 1 year warranty? How can I return the car if the seller is not responding to my requests?