I've seen others punters on this forum receive a discount for bad service from N5M when they complained and myself got discount once because there was some issue some time ago.

Maybe some girls banned OP as it seems like other punters didn't face as much issue as the OP. You said no good reason, but we will never know unless we hear from the girl directly.

That thread is literally from 2016 and N5M is still in business... (I had to wait sometimes as all rooms were full) I guess good for them if they do what they want and it still works. If you don't like the way they run, I guess it's best to stop wasting your precious time and money on N5M and go elsewhere.

You can read multiple complaints for all the popular shops on here. It's not just N5M. I encountered same, if not more, issues in other popular big shops as well. Translate Catchgod posts and there are many info out there..

Not trying to defend N5M and I agree Ginza does a better job when it comes to accomodating customers, but honestly any shops I have been to had "unethical" issues like you say. IMHO just move on and let N5M lose your valuable money and time.