I have been receiving calls on my office phone and it is annoying. Tried answering and all I get is a busy signal. I've now ignored them and not answered. 244 is an Angola County Code (Africa). They call me also 2-3 times daily. They do not leave a voice mail, but it is definitely annoying to have them ringing my office phone off the hook. My advise is, don't answer the phone. These people need to be stopped. They have noting I want or need.