Feel so stupid, just charged £120 for a £30 oven part and didn't check at the time of repair as was rushing for school run. Called company, fed me a load of nonsense about it coming with a 6 month warranty of which I had no knowledge and nothing in writing. They are refusing to refund - can I get a chargeback on this do you think, or it's my own stupid fault for agreeing to the price without checking?