My MXB Issue logging in

[Lewis4343]

Hello. I haven't logged in to My MXB for a long time so stupid me i didn't write down my password or email I used as I changed them recently. I know what my GUID number is so is there a way to log in through that. I tried contacting My MXB through Facebook about this but I have not got a reply in a week. Does anyone know if there is a way to log in with just my GUID number? I have also tried to reset and recover passwords but I did not like it. I did try to make a new account but because my GUID number is already in use I cant use it.
Thank you to anyone who reads this or comments.
THX