You can always change you profession on your visa. The procedure of changing visa is listed somewhere in this forum and you can search that. You can only change your profession if your family has the visa for that category which obviously they don't have otherwise they could have called you on correct visa.

Government institutes do not have power to cancel your cleaner visa. The only option you have is that somehow you get a NOC from your current employer. Find a new job and come back on new visa in a new company.