First, I got a call from the number 901-497-7340, which I ignored. In a minute I got another call from UNKNOWN, which I also ignored but got a voice mail. The voice mail said something "This is the last chance for a special order, blah-blah-blah". Didn't finish listening, erased.
If you have Android phone or other that has Reject List feature - enable it and add the number to the list.
On Android phone go to Settings, then Call settings, All calls, Auto reject, put a check mark on "Enable auto reject". Then go to Auto reject list, check "Unknown" and then added numbers you want to reject.
Also, after you receive a call from another scammer - go to Phone, Logs, click on the phone, Menu and select "add to reject list".