Hi O4OFF,
I'd send em the bill mate.
It amazes me how some businesses can stay in business when they ignore their customers when they have a problem with a product. Its the perfect opportunity for them to not only fix the problem but if they do it right then they will retain that customer as well as generate interest in their products because that customer will give advice to other users that if they do have a problem then that particular company will look after you. Its a no brainer for me but some people just dont get it.
Cheers,
Rob