What does this have to do with bitcoin requiring technical support?
Have you lost any bitcoins or do you need help with some kind of issue or have you just had unfamiliar numbers calling you because if so your thread is spam & nothing to do with bitcoin?
my ETH wallet has been stolen 1 year ago without knowing how the hacker got my PV key.
I changed the method of protection using 2FA so I am scaring if the hacker can pass 2FA
This is so unlucky.
Make sure your computer is safe from phishing, malware, keylogger because in this case, even with 2 thousand factor authentication the hacker will
get access to your wallet. Use an antivirus, possibly paid. It's just $30/year and it saves you from losing millions. I guess it is worth it