Mouldy wendy house disaster

Wish I had checked reviews before buying! The floor and wooden frame started to grow mould within a few days of being erected. The roof leaks and the Nutech panels are not sealed at the joints. I tried getting the business owner to fix the mess but was told it would cost me an additional amount. Will have to get another company to come and redo frame and floor before I will be able to use the wendy house. Very disappointed with this business!