This happened to me as well about a month back or so. I asked for an explanation, but received crickets....

Hi guys! Sorry for the late reply, it may be caused by the forum per se. Due to the large amount of spamming bots, sometimes the system may ban users incorrectly. If you are banned by mistake, please contact our Support team via https://plrm.me/arena_support or email them at: [email protected]. They will help you as fast as they can