Hyatt's website lists the number as +1 365-722-0818 (ChatGPT and Copilot also say this, well because source shows as Hyatt.com). When cal this number it's either
a) blank ... no ringing, no busy ...de nada
b) after some moment "sorry , you call cannot be completed as dialed"
c) rings and rings (maybe 7-10 times) then disconnects

Now, wouldn't it be greatly helpful if they listed an E-MAIL on their website !!!!!

1.5 hours on this... Hyatt is wasting loyalty member's time and causing frustration

Called nearby property (another Hyatt Place) and lady said she was central reservations for the whole province of Ontario ...not helpful
Called same nearby property again and got front-desk , but he didn't understand i wanted a different property

Totally frustrating Hyatt ... put EMAIL's on website, and get your property(ies)'s phone systems working !!