same here, banned for using third party software, with the same generic answer
apparently they can ban you for using any software, i have been banned for using a software that they themselves said they would never ban anyone for using it on the reddit forums. they themselves said they would at best block that software
well i was banned after 3 days of playing and without any warning, nobody accused me of using cheats but they don't do any further investigation, their anticheat system marks you as a cheater and there is nothing else to do.