I wanted to do a post on how to say no to a street fundraiser as so many people struggle with it, which I've never understood. The big secret is to say "No thanks" or "No" or nothing and keep walking on your usual path. That works 99.9% of the time.
If that doesn't work then you need to make a complaint...I'm going to do a post on 'How To Make A Complaint' as so many people seem to struggle with that too. (Hint: the first person you need to call is someone who can do something about it)
But I've also stolen a great idea from Diarmaid O'Sullivan and built upon it. So here's a voucher/coupon for you to complete and give to street fundraisers who try to engage you: