Licence recovery email expired

Purchased samba pos license directly from samba pos market. The email id given that time was under restaurant domain email. Not using that domain at the moment. Yesterday after a service, we have to reactivate the Samba POS account. Forgot the password and don’t have access to the email id for recovery. Just have the username with us at the moment.
Can someone suggest a solution to this situation ?

You would need to speak to @Tayfun


Thanks @JTRTech .
I will ask the client to directly contact him.