Consider paying part of the amount on a credit card, and pay it off before any interest is accrued.
From moneysavingexpert.com
'Basically, buy something - in this case a car - anywhere worldwide, costing between £100 and £30,000 and pay for any of it (even just 1p) on a credit card and the card company is jointly liable with the seller. So if it's faulty or you don't get the service, you can go to the card firm for your money back.'