VPN/IP Masking but it is not true

I have withdrawn from Elitetrader a few times without problems now they have come up with the problem of using VPN or IP masking during trading sessions.
Too bad I have never used such technology during my trading.
I always trade from my fixed PC at home and this seems to me just an excuse not to pay those who are working very well.

Many other users have had the same problem and they reply to all of them with the same automated email without providing concrete evidence.

Then they will say it is all fake with the usual automated message too bad you cannot attach details here on trustpilot.

Don't buy challange anymore you will lose money and time.