Who called from 31205813900

I riceved today

I received a call from this number today. When I called back it asked me for an extension number. I tried a few numbers and the phone line was dropped.

It called

I've just received a call from this number. It's the second time it calls. Have you any news about it?

I received a call from this number 2 times today. And my number is hidden for the public.
If they try to contact me again i will file a complaint at my police station.