Not sure if I've put this but I used to get frequent calls from shelter, a homeless charity to whom I donate £4 a month.
Then I was made redundant and had to move back into my mum and dads.
They began calling 3 or 4 times a week, asking for me to upgrade to £10 a month.
I struggled to get one off the phone, as he kept going on about the recession and how people are struggling at the moment. I told him yes! I know as I've just lost my job and my flat thanks so I can't give you £10 a month I haven't got! He paused, then rather snotting said "well, how much more CAN you afford to give us then?".
Cancelled the subscription there and then. My husband watched a documentary where a telesales whistle blower admitted the person you call has to say NO three times before you let them out the phone down on you.