We have a Daikin AC controller but is password protected. It was installed by a local firm who insist they have not put a password on the controller, but as I have only worked here a month, if was either them or the magical fairies, either way they are not willing to help, but I can not control hot/cold in our office block

Go to the Daikin web site and see if they list the model number for a manual. The password reset might be contained in that manual. What does management have to say about it. Could be they are trying to save energy.