I believe you get your contributions, but not the rest. Here's a similar story I just found - https://www.cbc.ca/news/politics/don-meredith-eligible-pension-1.4108605

Don Meredith is eligible to collect his parliamentary pension because he resigned from the Senate before facing an expulsion vote, Treasury Board officials say.

If Meredith had been expelled — a motion his former colleagues were set to vote on in the coming days — he would have had to forgo future pension payments, but would have had contributions he made to the plan reimbursed.

I believe its the same for provincial ministers, but I could be mistaken.