Can't trim, won't trim

Jebus149

Junior Member
I was bought a Nine Eagle Bravo SX months ago for my birthday. When I tried using it I couldn't control it so it went back in its box. I tried again and gave it more of an effort this time but I can't stop it sliding to the left. I have the aileron trim set all the way over to the right but it still keeps going left. Does anybody have any suggestions or am I going to have to just give up?