Please help me unbind the domain 20151007.xyz from another hosting account

Website URL

20151007.xyz

Error Message

I own the domain 20151007.xyz, this domain is bound to an old InfinityFree account, but I completely forgot the registration email of that account.

I tried the domain password reset function, the system said reset link sent, but I checked all my mailboxes including spam folder, zero reset email received.

I can’t log into that old account to unbind the domain myself. I am the legal owner of this domain and can provide DNS TXT verification records to prove ownership.

Please help me locate the old account’s registered email, or manually release this domain binding so I can add it to my current InfinityFree account.