Help - account recovery

I am an Ugandan and I have a Bitcoin wallet with Xapo, which I opened around 2014. At the time, I
set two-factor authentication using a phone number from a telecom company that is now defunct (Sure Telecom). Because that number no longer works, I cannot log in to access the wallet.

I attempted a recovery process and was asked to send my personal details, a photo, my national ID, and a photo of me holding the national ID. I submitted those materials, but I did not receive any positive or negative response from Xapo.

When I later tried another recovery process, it appeared that Xapo may have changed. I was not sure whether the original Bitcoin wallet company was still operating in the same capacity. The current service seemed more like mainstream banking than the Bitcoin wallet service I originally used.

My main objective is to recover or re-establish access to the old wallet/account and reset the two-factor authentication method that is tied to the obsolete phone number.

I may still be able to identify the old phone number if I search my records. I would like help determining
whether Xapo still exists in a relevant capacity, whether the account can be recovered, and what legal or formal recovery steps are available.