Everything is explained correctly already if you click on “Details” on the support us page for the custom planets, and then actually click on the link in there that says " please make sure to read the overall specifications here! ".
Directly from that link,
“If a player acquires a Supporter Planet/Space with only one month remaining in the season, they would still enjoy 2 more months on their Supporter Planet/Space during the next season.”
And then,
“If a player wants to keep their Supporter Playfield after its usual lifespan, they must re-support. HWS needs to plan the next season well in advance, so whether you do or do not plan on keeping your Supporter planet / space, be sure to let @RexXxus know your plans for the next season.”
So this is exactly what happened here.
The 90 days ran out, and they didn’t contact Rex ahead of time to schedule it for renewal.
So now the playfield belongs to HWS for now until (if) the original supporter decides to renew it.
Take your issues up with the original supporter.
Or better yet, blame yourself for not looking into who owned the playfield and what their future plans were for it (or lack of plans for that matter) before you built on it…
Don’t blame HWS for you failing to look into things properly, that’s your responsibility for playing on the server.