they call my mobile and did not leave a message

Same as others.  Called cell (which is a prepaid) for me.  No message.  I hate these people calling this number.  I only got this for emergencies if I get stranded away from home.

Called and hung up when I said hello

Recorded message from "your credit card companys accounting department". But, "there's no need to be concerned" as they're "contacting you to introduce new ways to lower your credit card debt and increase your credit rating."

So tired of these dumbasses!

Another area code blocked=)

Called and hung up when I said hello.

These people are calling from a call center, no matter what you tell them they repeat a week later at a
different time of the day.