Turtle Beach Throttle not working at all

I have the Turtle Beach Flight Controller system and the buttons to change the throttle from Cessna 152/172/etc., and the levers used in jets, got stuck in Twin Engine Jet mode with no way to change it. I went round and round (2 weeks) with Support@Turtlebeach.com so many times, they finally sent me a shipping label to print and send the system back. I decided not to send it back and eat the cost of the $400 I paid for the yoke/throttle system. I don’t trust them any longer. I fear they’d keep the system and say it got lost in transit, that’s the level of incompetence I experienced. I’m still using it in Twin Engine Jet mode.