Got a missed call. Called back. English speaking man with weird accent told me that he had sent me an e-mail. I told I'd check it then. Then he said I'd have to call him back in order to get his e-mail (???!). I hung up.  I called my operator. They didn't think it was a scam system. My call had cost me € 2.50 per minute.
This morning the same man called me again telling me he had sent me an e-mail. I asked who is he looking for - "Anna" something. I told him he had the wrong number again and he got anxious about me talking to him yesterday already...and now I am saying it's the wrong person. He cut off the call while still talking to himself.

I looked up the number. Seems its probably one of the scam system numbers from Benin, Africa.