What is wrong with my phone? Please help.?

i am re asking this because i didnt get very good answers last time... I have a sanyo incognito and about a month or two ago the charger that came with it stopped working.. I had to jiggle the charger to get it to work.. Then once it started working i couldnt move it or else it would stop working. My car charger however worked fine. Now the same problem has happened with a new wall charger. I have not tried it with my car charger though. I use my phone will its plugged in alot if that helps