How to get my iphone to charge?

I have an iphone 4 and the original charger that was with it. For some reason, it won't charge. I've tried resetting it, using different charges, using different outlets, cleaning the part where you put the plug in, connecting it to my mac, and clearing the memory. None of that has done anything. Whenever i plug it in it says it doesn't reaconize its plugged in and it doesn't charge.

P.S
here are a few things that may have affected it:
-I got back from a few days ago and it when through airport security
-I dropped it pretty hard on pavement
-A month ago it froze completly while skiing
-yessterday i "synced" it to my mac to upload images

Call apple

Yeah call apple

If you haven't tried this blow on both end the charger and the phone