Please help this is really frustrating.?

ok so i bought this phone gt350 a href="http://reviews.argos.co.uk/1493-en_gb/5185157/reviews.htm" rel="nofollow"http://reviews.argos.co.uk/1493-en_gb/51…/a and for the first time when i am charging it, it doesn't get enough ffor e.g i was told to charge for 6 hours and now its 14 hours what do i do if u have this phone please help me