Don't know who this is but is being really irritating

I did not answer this number as it wasn't in my contacts and have no idea who it was

beware

My mobile and my email Spam folder have gone ballistic since I entered a "Woolies" your chance to win $500 with this survey ". So Angry !!!!! I delete my spam emails - about 20 a day and do not answer my mobile.

3 calls. No answer. And on my mobile !!!!!!