They've called 10 times in less than 3 days. I reported them to the Do Not Call Registry and blocked them on my phone.  (ATT landline-hit *61 immediately after they call.) Let's see if this works......

Getting 3-4 calla from "Optimus Consult" every day.  We don't answer and they leave no message.  Some of you said you block that number.  Do you have special app for that?

I was in the process of looking up the phone number online when they called again. It's a group that calls itself Metamorphic and is trying to do a political survey. But they wanted a particular person, who wasn't here. If I had been talking to a real perso instead of a recording, I could have told them they'll never reach that person at my number.

Same experience.  "OPTIMUS CONSULT" by caller ID.  Calls repeatedly, (Just called as I am writing this - 2:34 pm est)  Up to 4 times daily in pairs nearly back to back.  I Never answer, caller never leaves a message.  Too bad we can't flood them with messages.  Just leave a message Jerk!  Called them back and left a message.  Aha, we can bombard them with messages.  I called them again and left another message.  Both times the answering voice identified the number as "METAMORPHIC O".  Called them again and left a final message to stop calling.  This still doesn't equal the number of times they have called me - 10 times in 3 days.

3-4 times a day and I wish I COULD block it