Looking for help getting access to IG page that I own the domain for (listed in the bio of the IG page)

Hello, I am looking to get access to an IG account that has been inactive for about 10 years. In the bio there is a URL listed for which I now own the domain. I bought the domain from the previous owners of the IG page, but they do not have access to the email anymore. They claim it is an email that is associated to the domain I own, but I have not been able to get the password reset to work. I am in direct contact with the previous owner, however it seems I am on my own.

I can send more details privately when ready. This should be an easy one to claim considering I own the domain which matches the username, and the (apparently) the email address.

Thank you!