It depends on the stock you have invested in and the reason for the delisting. If it is due to bankruptcy, the position gets liquidated in most cases. The circumstances surrounding the liquidation may vary slightly, but the outcome is the same.
In some cases, if an instrument is traded on several trading venues, and one of them decides to delist the stock, if our intermediary could provide access to a venue still offering it, you might be able to keep your shares.
Unfortunately, we cannot provide you with a universal answer that applies to all situations. Our approach corresponds to the nature of the case.