Vauxhall Astra clutch pedal stuck

Take it back to whoever carried out the work for rectification under warranty .If you do anything to it it will give them grounds to reject claim

Just had RAC out and they’ve said it’s a concentric clutch bearing failure or something along those lines, it’s back in the garage on Monday

They should have replaced concentric bearing as part of clutch repair , crazy if they did not . Whatever , down to them to fix at their expense .

If they replaced the bearing , up to them to claim back from their suppliers for part and labour incurred