Faulty Hit RC Percy

Recently I got a Hit toys RC percy for cheap, but both engine and remote weren't working. I somehow got the remote working after accidentally leaving it on and the throttle in forward overnight (puffing sounds is an odd noise to wake up to at 7 in the morning but it's working now so I can't complain) percy himself isn't responding to the remote and I can only make the red light in the bunker flicker if I take out one of the batteries in the coach. All the wires are connected and I have taken the motor apart but that didn't change anything. I did look on here but I didn't find anything helpful. Does anyone know what the issue might be? Many thanks!