I called back just out of curiosity.
It's AGON Direct Marketing.
The message says they ' are a leader in insurance survey...' and that's all I heard before I hung up.

Who has this number?

It's AVON - the make-up company

Have been getting these calls for about a week now, and have happened to miss every one of them. Now that i know its just spam i'll continue to ignore, but does anyone know how long they'll keep trying me for?

I received a call from this number several times but no one speaks

I called back, and it says they are a direct marketing company or something?