Marriott Owner Services phone number is 888-682-4862.
Well, they say curiosity killed the cat. I just had to call 407-903-6180. When you call you get automated prompts that is the same voice as you get when calling Marriott Vacation Club. However, there are just two options. One for if you are a Marriott Vacation Club owner and one if "all other guests". Both seem to just go to a person who answers the phone. I didn't have any hold time.
They asked for my name. I just gave them my first name. They asked how I heard about Marriott promotions. I said I had a voice mail about "unused reward". Just as the OP indicated. I never received a voicemail though. They put me on hold. After coming back they stated that they could book a promotional stay at a number of different resorts using Bonvoy points. 4 days, 3 nights in Palm Beach or 5 days, 4 nights in Ft Lauderdale. Other locations were mentioned; Orlando, Cancun, Myrtle Beach. The stays would be 75,000 Bonvoy points. I asked if they required a timeshare presentation and after putting me on hold to ask, I was told that yes a timeshare presentation was required. I said I wasn't interested but was given a different number to call back if I changed my mind; 888-800-4352.
I found it all rather strange, but my defenses were quite high. I don't know if it is legit or a phishing scam just to get your Bonvoy information. When I Google search both of the phone numbers provided, they don't turn up anything definitive but the top results seem to be for Marriott Vacation Club. However, the resulting pages don't actually contain those phone numbers.
What also makes me suspicious is that I don't even have 75,000 points in my account. They didn't tell me how many points I had, just that I had enough to make the reservation.
