Phone locked, Account empty

Hello, my phone is suddenly locked my Avast/AVG Anti-Theft. In my myAVG-Account I can’t find any mobile phone. I think, AVG deleted it. Now I get a mail message every time I try to find out the privacy password. But how can Anti-Theft lock my phone and send mails to my address if I don’t have any phone in my account???

https://support.avg.com

https://www.avg.com/de-de/impressum
(see mail address)

==>
AVG == AVAST !!!

Yes, but AVG still runs its own support.