Use the Contact Us link at the bottom of the page and ask Amazon to check. They don't check in here.
You should know that Amazon uses it's own format to determine page numbers, so it may or may not actually be wrong. Depending on what you write in, and how you uploaded it, using the formula will come up with a page count.
If you're talking about the "Length" given for KDP titles, as defined by KDP as "The estimated length is calculated using the number of page turns on a Kindle, using settings to closely represent a physical book," then know that this length will vary from the length you might have of the work as it sits in your word processor.
This figure is also different from the KENPC "pages" that are used for calculating pages read for the purpose of the payment-per-page.
E.g., my collection, The Dinosaur Chronicles, is 176 pp. as a paperback, was 198 pages for the Kindle "Length" (before that was overridden by the paperback length), and is 312 pp of KENPC pages.
Of course, your situation could also be a legitimate error. Give us the ASIN and one of us will have a look to see if anything's obviously wrong.
My rule of thumb is 250 words to a page, though of course it will vary by cleanliness of your html. (Your book is in html, though you may not have written it as such.) A typical print page runs around 400 words.
If you have a print edition, Amazon may use that figure instead for the e-book.