How to get device or Apple ID unlinked to a unauthorized co. and developer?

Thanks for your reply Eric. Yes, its been changed a few times already. I have a developer pretending to be my corp admin in enterprise ....in other words the device is provisioned to be monitored. According to Apple it's not in Enterprise, but I just discovered an lower level of corporate participation Apple business....I'm new to Apple. Having converted from windows as it's supposed to be more secure .....this after 22 months of all my devices being controlled by an unauthorized developer. They were in the MAC faster than my windows devices. No one can help. What to do>?