I called back number (03) 9028 5679 reached the fund raising department of atol solutions. They are calling regarding a fund raising.

I received calls from this number and I rang back. They are a fund raising organisation for several charities. I asked them to take me off their list - we shall see.

I was told this was a Telstra number to ring when I had some (obvious Indian) call centre trying to get me to turn of my computer

I had a call from this number. When I answered there was no reply.