Guests in Deluxe Verandah Suites - PS, S or SA/SB/SC have the privelege of having breakfast in the Pinnacle. We were in an S Deluxe Verandah Suite on the Veendam last week and we enjoyed having breakfast in the Pinnacle a few mornings.
Maybe the person you spoke to at HAL thought you meant a Deluxe Outside Suite and these guests do not have this privelege.
What ship and what cabin # have you booked or are planning on booking?
If I knew this then I could definitely say whether or not you had this privelege.