Stopping robo spam calls
I am using iPhone 10 or 12 (see photo.)I keep getting robo spam calls. Sometimes 20 a day. I have to manually block and delete calls; but other numbers are then generated; many with my same area code.
i have the setting turned on that the call is identified as spam and doesn’t ring. But each one I have to go through the block and delete process.
my number is registered on the National no call directory.
1) how can I stop getting these calls; not just block
2) how did this happen?
thank you in advance for your help!!!!
iPhone 12, iOS 15