I called back number (02) 8317 3181 it says the number I have dialed is not in service anymore.

Yea if you have your email to someone online about trading then you'll have as much luck as me getting rid of the calls (daily, same time)

Called my mobile 3 times in 45 mins but I did not answer and they didn't leave a message - dodgy behaviour point 1. Tried to call the number back on my landline but got an American voice saying number not in service - dodgy behaviour point 2. Blocked the number on my phone - peace and quite now.

Keep getting calls from this number... when I call back, I get put on hold. Stop!