As per Peter - Attempted to call back, no response. Occurred immediately after I signed up for an online trading software app that I just wanted to check out.

Get persistent calls from this number which I refuse to answer send automated responses back to it which bounce!!!

Received multiple calls from this number, I immediately let it go straight to voicemail and they mustn't of noticed as I've had multiple voicemails of people talking in the background, presuming it's a call centre of some sort.

They hang up before I answer but keep on every day trying

Very persistent caller, I don't answer because I don't know who it is. Unknown