I wonder if anyone can advise what to do next?

I made a reservation using points for two nights. I wanted to book for three nights but the room was not available for the third night.

But then I found an upgraded room at the same hotel which was available for the third night and I made a separate reservation for the third night, also using points.

So in all I stayed three nights on two reservations.

Initially I did not get any nights credited but when I completed missing stay request I was credited for one night (not three).

Then I called Marriott line and she told me she will fix it. But then I got the following reply:

"Thank you for contacting Marriott Bonvoy regarding your recent stay at the xxx, Autograph Collection. We hope you enjoyed your visit with us.

We appreciate the chance to help you with your account. While researching your request, we found that our records indicate that your stay has already posted to your Marriott Bonvoy account. You can view this stay on your online account summary at marriott.com.

If you have additional questions about this matter, please contact our customer service department at:

https://www.marriott.com/help/default.mi

Thank you for being a loyal member with Marriott Bonvoy."

Not sure what to do next. I'm quite keen to get the nights credited. Last year I missed out on Titanium by two nights.