I Can`t Use My Nokia 6300 For 4hours(please I Need Help)

Hello Nairalanders, i bought my Nokia 6300 on the 30th of june for whooping #30,000, The best Nokia phone that i have seen so far, But its not a month that i got it am beinging to think twice,  The battery if fully charged dont stay for more than 4hours, and if you make call or play the mp3 or play game the battery cover gets very hot, to the extend you can no longer hold it, i have visited the GSMARENA WEBSITE thats the the problem the nokia 6300 user are complaining too, so am really confused now because i can`t affoard to spend #30,000 at my age for this kind of phone, PLEASE i need help from anyone that has any idea on how and what i can do for the battery to last atlest 2days and to stop getting hot when making calls or playing muzic, I will really be greatful to whoever that can help me out now.

Ever heard of d gud old CARIBE VIRUS? Think your fone is infectd get an antivirus and run a scan on your fone