Reply to Damaged loop length rotary. Anyway it can be repaired without voiding the warranty?

I've managed to bend one of the rotary encoders on my s4 and was wondering if there is anyway of repairing it without taking my s4 apart and voiding the warranty? Its been bent so far over it no longer clicks when you press down and haven't had the time to check whether it works in the software or not.
The reason I ask is because my mums boyfriend is an electrician and says he could fix it but if not is there somewhere I can send it off to to get it repaired?