It's a 20-30min job. You just knock the old ring off and brush it all down grease it slightly and then knock the new ring on. Sounds like he rung you out tbh. If it was the passenger side you would need your oil replaced too
Yeah, they replaced the entire driveshaft, so effectively £130 for a ring . Seems to be a common problem with Clio's, I've spoken to someone else who also had to have the entire assembly replaced.
Pete