You buy it for €200/month - simples.
It’s not their device, one device can’t achieve that, it’s typically an integration gone wild. And it’s actually incredibly hard to disable a rogue device without disabling all the gateways around it and even then the gateways would still send network traffic to the servers even if they were silently dropped.
Terms of Service implies a contract of which there is only the moral & ethical contract of the community use with the guidance of the Fair Use Policy. We don’t pay for TTN so it’s all run on good will.
It is straight forward enough for TTI staff to disable an account but they, like the rest of the world, benefit from down time every few days, whilst some of them are god like, even God rested on the Seventh day.
However if you pay for an instance and support, then there are funds to access the support network that runs all the time. But you’d rarely face such issues because people tend to look after the kit they pay for, mostly.