Disappointing customer service

I placed an online order on the 19 Feb 2024. I had initially placed the order for collection at an available store as they only had stock available. 3 weeks later I called Leroy Merlin to request to collect the order at a branch closed to where I reside. I was told that they would have to cancel the order and send me a voucher. I have followed up by emailing and calling with no resolution.I am highly disappointed in the service and non response as I need to continue following up. I do not think that this is a difficult thing to resolve. It cannot take 2 months to create a voucher.