LEROY AND MERLIN NOT PROCESSING REFUND

My last 2 online orders from Leroy and Merlin were executed perfectly but the latest one which was made in May 2023 terrible. I ordered an aluzinc brown double garage door and a white door was delivered. I immediately told the delivery guy to return the door on 05 June 2023. I called Leroy and Merlin on 07 June 2023 and I was asked if I needed a refund, I said No and asked that they deliver a correct door. 2 weeks went buy and my door was not delivered and when I enquired they kept telling me that they are waiting a for a supplier. I then requested for a refund on 21 June 2023 which I was told it would take 7 days, an email with request number 688096 was sent to me. on I called again on 29 June 2023 and confirmation of account was requested which I sent immediately. Seeing that my money is not credited, I called again on 04 July 2023 and a proof of payment claiming that money has been processed on 03 July 2023. I was happy in the manner of which Brenton was assisting me however my money is still not credited as we speak on 06 July 2023. I just told myself I will never ever trust Leroy and Merlin again. Once bitten twice shy.