How do fix the charger port for my quad core android tablet?

I have had this Double Power 10.1 Quad Core 1.3 GHz Android 4.4 K DPM1081K tablet: http://bit.ly/1KLLAeW since either January or February, and about a month ago, the charging port started shorting. I would have to fidget with the charger in order to charge it. Now, no matter how much I move the cord around, it won't charge... at all. I started using the usb drive to charge it, and not very long after, THAT started shorting too. Now, neither works. It's about to die, and we paid $100 for this trash just to have it stop charging in 4 or 5 months. Is there a way to fix this problem so that my money doesn't go to waste? Thanks.