That's not proof that YouTube is banning channels for buying views and subscribers. In fact, that's not even proof that you were banned for the views/subscribers you purchased. Proof would be, YouTube emailing you to tell you they banned your channel because you bought fake services to cheat the system, but they didn't so you don't have any proof.
What kind of videos were you uploading? Were they completely original or did you use parts of videos from other users? Did you stuff your description or title with repeat keywords? What kind of views were they, what quantity did you order, and how fast were they delivered? Same as previous but with the subscribers and other services, if any? Did you have monetization turned on for the video you delivered the fake views to? Did you have another channel banned previously or was this your first? Were you in a controversial niche (like game hacks, etc.)? Did you promote anything dodgy in your video description/pinned comment?
You may be right, however most people who say they were banned for buying from panels were actually banned for the content they uploaded. The last case I looked into, the guy repeated his main keyword in title 2x, and put tags in his description underneath actual description text which in which multiple of the same keywords were repeated. Plus, his videos were compilation videos that he definitely didn't license content for. It seems that everyone who tells me they were banned for buying views and shit, actually broke several of the community guidelines.