My Moons are Missing From My Vault

Hello, 2 years ago i was pretty active in this sub. I had more than 2700 moons which i decided to hold untill maybe 2025, maybe more.I am still coming to this sub, but rarelier. So when I checked my vault earlier today, i saw there was unfortunately no moons there. Do you people know if something like an event or deletion happened? Where could my moons be and how can i retrieve them back? Because i don't want my effort to go waste like it always does. I still wanna hold till 2025 and try to sell then. It will be a big help really since i am going to start living in another country and build a new life. This means that every penny is helpful.