Holden had a number of bites of the apple to fix this issue. 1st dielectric grease, then epoxy, then in some cases rack replacement before the accc registered voluntary recall was done. This later recall entailed a repair kit to fix the issue (so you didn’t get a full new rack).
So then the question is which one did you have done and when? if it was the accc voluntary recall recall, the dealer doing the job may have botched it but it’s guaranteed (as any work is). If it was something earlier like grease or glue, have the accc voluntary recall done...
In either case, I’d go back to the dealer and get them to recheck the steering and the recall work they did as something ain’t correct if steering binds up and then over assists.
Just don’t fork out $$ to fix what may be their stuff up