Yes, it we're speaking so strictly, you're absolutely right. I was attempting to make light of the situation. Sorry if my attempt at humor was not well-received..
Hi! I'm not sure if my visa is valid, and all "immigration consultants" can not answer me directly. My short-term entry visa is attached to my Certificate of Sponsorship, which has been revoked together with the contract. Be default I assume that my visa is revoked too, because I don't want to take that chance.