Logging into new PC gave "Client Ban" ?

I recently moved from California to Wisconsin, and while waiting for my setup to arrive a friend, whom I trust and always game with, who has 1000+ hours, said I could use his computer to play Apex while he was gone to work. Is there a limit to the amount of accounts allowed to login to 1 pc? He has his own account and 1 alternate account to play with friends of lower ranks. So with my account logging in, that makes 3 total account on this one PC that have been logged in. I’ve never logged in on insecure wifi, I’ve never used anything besides Origin launcher to login and/or steam. We are both very confused, and as you could imagine, upset. We believe that EA thinks account sharing is what’s going on here but how could we prove that we aren’t? This seems just like as if someone on console let their friends sign in to their profile and play, if that makes sense. Our account are not banned and are still active but we were both hit with the “client ban” screen every time we attempt to queue in. I wish there was something we could do to try and fix this, I feel the worst out of the two of us bc had I not asked if I could play on his computer for the time being, nothing would have ever happened to HIS account…