"Reward redemption" recording saying I was getting a $100 gift certificate to one of many popular stores such as Walmart and Target. Blocked my number and called back, and when you press 1 to talk to a rep (because I like to mess with these people and waste their time), it says that the number I have dialed is invalid.

no message

Call came at 7:30 am; believe it was disconnected because I did not answer the call and it went to voice mail (no message left).

Called me just a few minutes ago, didn't answer. Probably spam.

5 calls from various spoofed numbers today. If the pattern continues I'll get another one soon. DO NOT ANSWER! DO NOT CALL BACK! Block the number. I am now considering a screening app.
Numbers from today:
4075300051 Kissimmee FL 10:08 AM CST
4842233324 Allentown PA 11:43 AM CST
3852183054 Salt Lake City UT 12:11 PM CST
3235405157 Huntington Park CA 5:19 PM CST
5162467112 Garden City NY 5:49 PM CST