Why won't my Stealth G4 charge?

I bought my Stealth from a local Pawn Shop before Christmas 2016, and it's always worked great. I bought the 90 day warranty. The charger has always been a little loose when we've plugged it up to charge, but it's still charged with no problems whatsoever. It's been about 10 months now, and all of the sudden nearly a week ago I plugged in the charger, and it would not charge. I tried several other chargers in our home, and it still would not charge. I tried to wiggle it slightly since it's loose... Nothing - no luck! What's wrong, can it be fixed and if so how difficult is this going to be?