Mondo, an unsolicited cold call spammer

I have received a number of cold calls from Mondo. Each time from a new number and new company name "on behalf of Mondo"

I've asked to be removed from the list. This has not been done. I've asked on facebook and on their support number to be removed. They want my full name and phone number to do this. I refuse to provide my details, they already have my details.

They refuse to remove me by name. They keep calling me regardless of my requests.

I have tried using trucaller to block them but since they change phone numbers so regularly, they still manage to get through.

They are wasting my time and testing my patience