Changing email

can anyone tell me how to change my email that is attached to this site? or just simply delete this profile so i can just make a new one? im using a different email to when i first signed up. and want to use the new email for this profile. but the new one is also being used for some random profile it gave me. so i want to get rid of that profile and switch emails on this one.

EDIT: nvm, the email i want to change to wont let me do it since it already has a xbox account tied to it. since i have been using the new email address for some time i cant just delete it and create a new one.