Can't use old e-mail

I last used my account iChaotic mpgh. net /forum/ member.php?u=3083990 about 3 weeks ago and have come on to sell a csgo account but found every password I entered was incorrect. I believe this is due to the warning that all accounts have been de authorized. The thing is I am dumb and changed my email a while ago to one from 10minutemail so I need to have it changed to my main email. I can prove I own the account as I have posted before here - mpgh. net /forum/showthread.php?t=1021231 on post #13 that my skype account is "therainbowcoookiemonster" As you can see here - gyazo. com /fd7105a733cb1f1de737173cf65815ac I still own this skype account. other than that I don't really know how to prove I own my account. Is there anyway I can heave my email changed to my real one?

Password changed to your current account's email.