Since a VPN such as WTFast does nothing to alter any data sent or received by SE's servers, or provide one with any type of executable shortcut/advantage,SE will not take any actions against you.The only purpose of said software is to improve connection and lessen packet loss.As others have stated, the rep. most likely skimmed your correspondence,saw the word "program" and automatically gave you a pregenerated response that says," You may not use this".