Leroy Merlin takes your money and no service

I recently bought a gazebo from Leroy Merlin's online store (30th of Oct 2023) and I've chosen the Payflex option (4 interest free payments) when my gazebo arrived it was faulty and asked for a replacement as I really wanted the gazebo. with organizing for collection which took forever they finally collected it the 20th of Nov, but till to date (30 nov) exactly a month now have I received my replacement. Everytime I contact them they have the same story, as if it is robot speaking, "we will arrange for collection" When I contact customer care, they keep on saying its been escallated they cannot help me. I've made 3 payment installments and have NO gazebo to show, so now they are sitting with my payments AND my gazebo and i have nothing to show. Very disappointed as they are quick to take your money but cannot delivery my item. I am desperate as I don't even think they will refund so it's a loose loose situation for me