I phoned and said "I know my annual fee is due and I don't wish to pay it". The operator looked at my account and said yes I can see that it is due, I will have to put your through to my manager. So then someone else came on the line I repeated what I said about not wishing to pay the annual fee. I added that you can see that I use this card frequently. She said "let me take a look". Then she came back on the line and said that she can halve my annual fee. I would pay $149.50 and she would put a waiver through for the other half. I said I was happy with that and thanked her.
I have just checked my account, and yes I have an annual fee debit of $299 and a credit of $149.50 which says waiver until Nov 2020.
I was happy with the outcome. As I said previously I like the card and have had several shopping offers of extra points along the way.
Good luck, report back on your outcome.