yorkster
Corsas have a modified gear linkage that will be fitted FOC if your car is under warranty and cure the problem... nothing to do with the clutch. I replace these quite often (yes i work for vauxhall)
If not you have 2 options.
1, Replace the full linkage, cost £70.00 for part plus labour.
2, Replace the modified part of the linkage, cost £38.00 for part plus labour
You car is covered by a 3 year manufacturers warranty so you could be in luck and get all work done free
Regards,
Mick