phone wont turn on even after charge

hi i have charged my phone over night i have had a problem with charging it before it says the cord is not connected but it is i had to keep turing it of and than back on to get it to charge worked for a little bit now i cant get it to turn on at all cause it didn't charge i have tried all cords i have for it changed adaptors taken the battery out as well noting is working only had the phone since it was realised in 2013 please help