Hello Daryl,
Of course Cliff is right - you must claim against the seller. If they don’t respond, say by the end of the week, then I’d be tempted to issue them with a Small Claims court claim.
Clutches and costs? Main dealer clutch components are expensive/uneconomical, so resorting to an aftermarket one makes sense in this case. Personally, I would only go for a LUK make. You could then ask for a labour cost from a trusted local garage.
‘Just switched from a Scooby’. Would you describe your driving style as being ‘enthusiastic’ by any chance?
Kind regards,
Gareth.