I get between 2-5 spam phone calls every day. Often, the callers' numbers have the same area code as my own number. I believe the calls are automated there are many identical messages and on the occasion that I do answer, it's usually a recording.
I've blocked dozens of phone numbers but the calls and voicemails don't stop. I keep my phone perpetually on "Do Not Disturb" excepting calls from favorites and repeat callers. Sometimes I pick up the phone and repeat "Put me on your do-not-call list" a couple times. Sometimes the recording says to press a number to stop receiving calls, and I do that as well. I've also added my number to https://www.donotcall.gov/
Nothing seems to do the trick. It's really annoying and time-consuming to check my voicemails for real messages. The red notification badge is no longer a useful way to know if I've missed a call from someone I care about.
I don't want to get a new phone number either, and I don't know if that would even solve the issue.
What can I do?