Rust

Just telephoned company that make Jumpking to tell them our five year old supposedly galvanised trampoline has rusted. The ladder has fallen apart and some essential parts that attach the bed to the springs are rusted throughout thereby making the trampoline useless. I asked if they sold them as spare parts but no!!! I would have to buy a new bed costing over £99. Galvanised but obviously not if it rains!! I asked if this was reasonable for a five year old trampoline and they said it was up to the company we bought it from. Very, very disappointed.