Upgrade to Marriott premier Plus but ripped off on the 50K upgrade bonus

Has anyone had any experience with receiving a reduced upgrade bonus. I got an invite email for 50,000 Marriott points if I upgrade my Marriott card to the new Premier Plus. I only needed to have one spend swipe by 12/31 with no minimum. I was satisfied that the offer was perhaps the best I would receive. I upgraded and used the card in no time. The bonus posted but it was only 10,000 points. AND IT GETS BETTER. My wife has a separate account that we upgraded on the same phone call and you guessed it... she also only got 10,000. UGHHH! I already SM’d chase requesting correction on both. But I was wondering if this occurs often and how hard I am going to have to push back. Thanks in advance for feedback.