Still waiting for delivery with zero help from customer service

Place an order on 01/08. Didn't receive any order and saw on the app that the order was stuck on partial. Phoned the call center on 08/08. Was told the fireplace was not in stock. I asked them if I could get the showroom model as I saw it was still on display. Agent told me they would phone me back. After a couple of hours with no call back, I phoned the call center again. Had to go through the whole explanation again, again was told they will find out and give me a call back. On the 10th I phoned again twice both times also told that they would find out and give me a call back. No call receive. On the 12th another 2 calls. On the 13th went to the store and got the answer thet they could sell me the showroom model at full price and that I couldn't take it home with me as they needed to deliver the whole order and couldn't split the order. No delivery received yet after waiting half a month for my order, spending more than 30min worth of airtime. Very bad customer experience and would not recommend Leroy Merlin anymore after being a customer that told everyone to shop with them. Just want to cancel my order and get my money back as the waiting and lack of customer service leaves me with a bitter taste in my mouth.