Looking for some help with my Red Cat Volcano EXP Pro –

When the radio is switched on, and then the car is switched on. There is a red light that comes on solid. The motor/throttle jumps to full speed uncontrollable. I do have steering control when this happens but no throttle control.forward or reverse. I unplugged the battery, reconnected, changed the battery’s in the remote control. I am new to this and don’t know what to do from here. Any help? Thanks