Firstly, I'd use my super awesome ninja powers to break one of their wrists using my super kick of doom
Secondly, I'd unbalance them by punching the bottom of the elevator, making it vibrate amazingly intensely
Lastly, I'd use my Secret Forbidden Technique Shadow clone jutsu to hold off all 3 of them as I run off to go get my dad to take care of them.
Pretty tough situation but i think I'd manage