my iphone 5 is getting hot, the battery is very weak

Dear Sirs,

From Nov 1^st I use my new iPhone 5. Attached the purchasing invoice dated Oct 23^rd, 2012. (I live in Israel, I bought it in Switzerland)

This my third iPhone (I have the new Ipad too)

I face very significant problems with the iPhone 5; the phone is getting hot, the battery became weak after dew hours only.

For example, today, after FIVE hours of waiting time only, I received the sign "weak battery".

Could you please advise as urgent as possible what should I do ? what is the Email address of APPLE I should address this problem ?

I look forward to hear from you ASAP.

Sincerely yours

Ramy Zecharya
Tel: +972506542155
E-Mail: zramy@zahav.net.il