eFootball Mobile Account Lost After Phone Theft

I have been unable to access my eFootball mobile account after my Android phone, where I used to play the game via the Google Play Store, was stolen in April this year. My in‑game username on the lost account was “Maximento”, and since the theft I have completely lost access to this account and all the progress linked to it. I would like my eFootball mobile account with the username “Maximento” to be recovered and restored to me on my new device, with all my in‑game data and progress intact as far as possible. I have not yet contacted Konami support before this, and I am now requesting assistance so that my account can be identified and securely returned to me.