First off, I've heard of this happening, but I have never experienced it. You might try asking Horizon Hobby to swap the TX.
So many settings are personal choice / or default to reasonable settings. Here are the important ones you may not know.
Type Heli, Name Blade400 (or anything you want really)
Swash type CCPM 120 Degrees
Servo reversing (VERY IMPORTANT)
Swash MIX, Sign is more important than value.
Gyro Switch =Gyro
1=64 Most people would use 0=35% (Rate Mode), 1=66% HH mode and then adjust as desired.
Power Setting B-US 247
Timer Count down timer 4:30, switch Trainer.
DR/Expo position 0, all are 100% Expo Inhibited,
Position 1 , 90% Ail and Elev, 100% rudder, Expo inhibited.
but I would use 35% expo on Aileron and Elevator to get started.
Throttle curves are also personal preference, but default is
Normal 0,25,50,75,100, Stunt, 100,92.5,85,92.5,100, Throttle Hold, 2% for all points. I prefer to use 0% for all points.
Normal 35,42.5,50,75,100, Stunt 0,25,50,75,100. Throttle Hold same as Normal.