I don't know my email but know my username is there anyway I can get my account back by...

Hi Kaiden!

Please go to https://account.microsoft.com website and make sure to sign out the account that's currently signed in before you proceed with the account recovery.

Once signed out, go to https://account.live.com/username/recover to recover your account by using your gamertag or phone number that may be linked to the account you're trying to get back into.

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you in regard to your concern.

If you don't have an Xbox console we can try other methods such as checking your other devices (Laptop, PC, or mobile device) where you may have signed in before.

Please check all Microsoft accounts that you own and sign in to https://account.xbox.com/profile to locate the correct Microsoft account because according to Xbox support:

"Important Xbox Support can't provide this info, even if you know your gamertag."

my account was logged into and my username "vkpu" was changed and now is up for sale on Instagram is there anyway i can get my username back? i don't know why someone would hack my account to steal the name

sadly miscreants galore mess with peoples accounts all the time

yes its hackers email but I don't know hackers email. how can i get my account back anyway? is there any other way?

Well, this page covers account recovery but you still need to know the email address as that is the primary identifier of the account. Without the email, i don't believe there is anything they can do

https://support.xbox.com/en-GB/help/account-profile/manage-account/forgot-microsoft-account-solution