Wierd, who is this number ?

someone keeps on calling me... and wants me to pay!

I didn't answer

Started with +8000280683 with a computer voice with an important message for a name (Can't remember the name) it has now moved on to +08081013405 get calls about every 2 hours from 9:00-20:00 for the past 3days

Get call from that number every hour now. The first time was from MBMA, asking me to press any key. And the last time, no message at all.