You're at the very least clueless if you thought the box limit applied outside of running maps or rolling gacha. I exceed the limit all the time from backlogged manyus (had like 580/500 at one point).
And I'm always this abrasive to stupidity. I wasn't sympathetic to the guy who accidentally sold his Monotropastrum, but he fully admitted that it was probably his fault, so I didn't give him shit for it either. Maybe Nutaku will listen to your sob story on Discord and reopen the exchange again, but don't expect me to be nice about it here.
(Also, imagine not getting a second Lavender.)