i don't know my apple id and password of i cloud please help me

Are you still logged into the account anywhere so that you can look it up ? Or do you have any of the account's downloads in your computer's iTunes library so that you can do 'get-info' on them and see the id ? If not have you tried : If you forgot your Apple ID - Apple Support ?

If you still can't find it, and if you were the original purchaser of the phone (i.e. it wasn’t bought used) then try contacting iTunes Support online (https://www.apple.com/emea/support/itunes/contact.html) and see if they can remove the phone from the account - they are likely to want to see proof of ownership before they might help e.g. original receipt with the serial number on it

(Don't post personal info on here, you already know that you are only talking to fellow users.)