Lack of Delivery and out of stock again

Leroy merlin has major delivery issues. I ordered on the first and website says delivery in 5 to 7 days. I phone yesterday as I had heard nothing and was told the delivery would be delivered yesterday. Today I phoned again and suddenly they do not have stock of the one Item. I checked their website and it still says they have 105 of the item in question available for delivery. I have had multiple incidents with them on each order I have placed. I only ordered again as they were the only supplier with one of the other Items I needed or would have never used them. I still have items outstanding and no refund based on alternate items delivered from my previous order last year which I eventually gave up on.