Shirley Smarr

I would like to ask a question,I have a Curtis LT7033 Tablet,it wont charge up,I have to hold the charger with my hand to get a little charge,it wont stay. I was reading about the battery. I did use it to play a couple of games when I got it,but itwouldnt never charge over 40%. I notice the charger doesnt go all the way in.... Thanks........