Considering Moltdown happened 5 years ago, you took your sweet time lol.
We never managed to get our characters back, the best we got were all coins/vps we ever donated/vote + some bonuses. Sadly the dumb decision to also purge those coins after a few months or a year was made and even if you donated like 5000 coins and didn't log at all early on they're all gone now.
You can try and contact [email protected] with all possible evidence that you have such as bank statements of donations, account history of item purchase and that's about it. (no, screenshots are NOT evidence of ownership)
If you're lucky they may return you at least the coins you have spent back in the day, but that's a maybe. It happened a long time ago, you're a bit late and they are not really obliged to do so.