I have the same calls all the time. Now I just tell them its £65 for the first hour plus the cost of a new hose. If it goes over an hour it's £50 per hour after that plus any extra materials. I'd say 7 out of 10 go for it.
On another not I fitted a brand new Zanussi cooker a couple of weeks ago and the safety shut off valve didn't work when the lid was shut down. I id'd it and disconnected as you would. Zanussi and the supplier have refused to replace it and have suggested it was installed incorrectly! The elderly client hasn't had a cooker for 2 weeks and there is no number to contact Zanussi direct. I see the review rating for them is 0.8 out of 10 on a 168 reviews,9 so avoid them!
On another not I fitted a brand new Zanussi cooker a couple of weeks ago and the safety shut off valve didn't work when the lid was shut down. I id'd it and disconnected as you would. Zanussi and the supplier have refused to replace it and have suggested it was installed incorrectly! The elderly client hasn't had a cooker for 2 weeks and there is no number to contact Zanussi direct. I see the review rating for them is 0.8 out of 10 on a 168 reviews,9 so avoid them!