Hyundai Imax Gearbox & Transmission Problems

Assuming it's done by a diff specialist there's no reason to think it won't be long lasting. If you're not sure ask your dealer to explain to you why it needs to be rebuilt as such low kilometres of what appears to be light duty use.

The damage to the clutch was caused by you driving it for a kilometre instead of immediately calling for a tow truck. I doubt that you would get anywhere with the supplier.