Very bad service and experience

We bought a patio set on 24 Sept 2024 from Builders Richards Bay. It is starting to show damage. When we went to speak to the manager today, he went on about the 3 month guarantee from the supplier, which ends tomorrow. He said that in his view, it is user damage. How is it possible for a R4000 set to show user damage, if it is not in daily use. The seating part of the set is starting to break, on all 4 seats, not even on the parts that you sit with weight. And the backing is also breaking. It is made for a patio, and for the outdoors, and I would think that it being sold by Builders, that the quality would be a lot better. The manager also didn't really looked like he wanted to resolve the issue. We were promised to get feedback today after they spoke to the supplier. But, when we went to the store around 3pm, after struggeling to get hold of them, it came out that they haven't even phoned the supplier yet. How do I now believe that he actually phoned the supplier. I would appreciate, if someone other then the manager, contact me, and try and sort out the situation.