old account missing

Is this about your Community account or your Deezer account?

It’s best to ask this question directly to Deezer Support. They can check whether your account is still active or not.

You can find them here:

https://support.deezer.com/hc/en-gb/sections/115001146769-Manage-Your-Account

Or send in a request:

https://support.deezer.com/hc/en-gb/requests/new