Ouch. Not used a specialist? When doing the full suspension refresh on mine they had to cut loads of the old stuff off as it was all seized.
Parts ordered from Renault, Garage claims to be a Renault specialist, but spanner monkey didn't check they had the right bits before taking a cutter to the tie rod.
I've no issue with them removing it by cutting it in half, it was seized and is going in the bin anyway. But they should have checked they had the right parts before they went past the point of no return. Renault should have also sent the right parts out.
Still in the Golf, parts were due today so will chase for an update later on.