Ikea charged me £35 for delivery, but it wasn't there on time

I paid extra to get a four-hour time slot, and now the store won’t refund meI ordered a bed from Ikea online and paid £35 for the delivery service, which offered four-hour time slots. I picked 7-11am on a Saturday. At 8am the company called to say the drivers were delayed and did not know when the item would arrive, essentially asking me to wait in all day. The bed in fact arrived at 15.30. I asked for the delivery charge to be refunded but Ikea told me that as the bed arrived on the