Stuff like this has become all too common an occurrence these days.
I still have my UK email address and occasionally I will get an email claiming to be from BT, Virgin or Parcel Force.
The emails aren't so bad as I click spam if it hasn't already been flagged by my email provider.
What is annoying are the calls; especially since scammers have been using number spoofing. It's resulted in people calling other people and having heated exchanges.
It also means that these days if you call someone from a number not recognised chances are they won't even pick up.
I have a Google Pixel 3a and the automatic spam feature has been great. When a number has been flagged on Google's list my phone doesn't even ring, I just see a flagged number in my calls list.
When a call not in my contacts comes through I can screen the call which involves my phone asking them who they are and what they want. Whatever the person says is shown on the screen as text and I have the option to answer the call or mark as spam in which the phone gives a do not call message, flags and blocks the number, then hangs up.
In most cases once my phone answers the scammers hang up. This year the phone companies will be taking steps to reduce these unwanted calls but they say the effects will take a while to become effective.