We're running an internal migration of all old players' stats to our new highly advanced statistics tracking backend. This means that stat changes will be a bit delayed while we ingest this huge backlog of data. Nothing is being lost, it'll just take a bit longer to show up in the in-game UIs.
Make an appeal here: https://appeals.cubecraft.net/ using the appeal code you have on your punishment.
Do keep in mind that you need to stay polite, as if you're not, you probably won't be taken serious.