Mobile locked by avg theft after change of sim

Hello Giuio,
I'm sorry for any inconvenience caused. I can see that you have already contacted our Mobile support team, they will contact you via email with a solution soon.
Best regards,
Alok.
my mobile is locked by avg theft due to change of sim and wrong password. I try to use
https://www.avgmobilation.com/it/remote-management but the home page tell that any device is registered and doesn't show the unlock button

Hello Giuio,
I'm sorry for any inconvenience caused. I can see that you have already contacted our Mobile support team, they will contact you via email with a solution soon.
Best regards,
Alok.