Crap things, no more than 600 miles of gravel bashing and they are clapped.
Completely agree with that. I bought a set of a57 road wheels for commuting. First set of bearings last 500 miles, less than 3 weeks commuting, contacted planet x, they replaced them free of charge but whinged about it a bit first.
Refitted them and the rear went after less than 500 this time. Threw them in the bin – they’re shite and its the best place for them.
I’ve had loads of different wheels, shimano, mavic, etc on my commuter and the rims always wear before the hubs. Those wheels weren’t fit for purpose.
Sorry I can’t be more helpful with replacing the bearings but can only advise that you chuck the wheels where they deserve to be.