Missing goods

I have made an online orderfor delivery on the 16th of March. My order has still not been delivered, and I have received no communication from Leroy Merlin on the status of my order. I have tried phoning, but no-one answers. I have logged several cases via email, but I receive no feedback on the case. I have opened a case on their Whatsapp channel and they just say they will follow up, but then they close the case and I receive no feedback. All I want is to know where my order is and when it will be delivered. This is the most frustrating company to deal with, and I will definitely never order from them again.