Help me , Please!

I just purchased a 735 AirSquire mini-helicopter. Right out of the box
and for the first ten minutes or so of flight, it worked fine. Shortly
thereafter, the helicopter started to spin out-of-control to the right
and would no longer fly. The more throttle I gave, the faster the
entire helicopter would spin out of control. I tried adjusting the
trim setting, but that had little effect. I did not crash the
helicopter or otherwise damage it; at least that I am aware of. Could
someone please tell me what's wrong and how to fix the problem. I
really like this helicopter and would like to keep it. It's my first R/
C helicopter.

Thanks!

Mark