Worst service

I placed an order for a gas refill on the 22nd April and at checkout it showed that I would get my gas on the 24th April. Came the 24th April, the third party company calls and says they only got my order on that day so their delivery is fully booked so they won't be able to deliver my gas, like who's problem is it that you only got the order on the 24th??? I called Leroy Merlin and told them that if they can't deliver on that day then they must cancel the order and refund me. They then said they'll make a plan for it to be delivered. Today it's the 26th and I haven't heard from them