Im guessing your broker is custodian I.e. holds yours and their other client's options in their name (and under the same HIN) and bulk elects all of their clients corporate actions (e.g. option exercise together). Mine is the same (Saxo).
Because of the admin time to group them up and send then on all clients behalf they'll have a date earlier than expiry for their clients to get their exercise orders in by (I.e. yesterday for you). You should call up your broker and ask to speak to someone in corporate actions and get your request added to the bulk election if it hasn't yet been sent. If it has you will have to ask them to elect on your behalf separately.
Be nice but don't take no for an answer here. They CAN do it they just don't want to because of the extra ballache admin involved. Ask to speak to a manager, try everything
POK Price at posting:
20.0¢ Sentiment: Buy Disclosure: Held