Been getting a call from this number at least once a day. No message left. Finally decided to answer, just to see what's going on. Person seemed to be speaking to me in Russian. I told her that I couldn't understand what she was saying, and she replied that she probably had a wrong number.
Just call the number, select English, press * and then ask the representative to take you off the list. Your phone probably belonged to someone from a former Yugoslav country and that's why you get called.