Ferre after sales service

I bought a ferre freestanding gas hob and electric oven from Leroy Merlin about 8 weeks ago online. It was delivered nearly a month later. Once we did the installation, the ferre was not working. We tried logging a return online, but it reflected as not delivered, therefore the return request could not go through. I phoned and was told that it would be handed over to marketplace and escalated. A week and a half later I had no response and thus called again. I tried the return portal again, but it reflected as being delivered/ escalated to marketplace. I received an email advising that a technician would come test the hob/stove to date nobody has been out 1 week after this email. Due to us having sold out other oven, we have had no oven, thus we bought a different gas hob/ oven which has sonce been installed by the same installer and has been working 100% fine. The ferre is sitting in our garage and we would appreciate it if we receive a refund and this ferre is collected immediately. Shocking service, response time is very inadequate, after sale service is shocking. Will never suggest Leroy Merlin to anyone.