Can you make a complaint against tutors at uni?Watch
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If that is unsatisfactory and you dont trust the department at all, then you will have to go a bit nuclear and complain to the uni itself. It would be really at department level and you would enter the official complaints procedure, make a formal submission and your complaint would be overseen by someone independent.
You may wish to talk to the student advisor at the uni. It would seem more constructive to me to talk to your PT and work it out with the tutors or the department. If you want to go formal, then you need evidence and you need to know what breach of the rules they have made. I would try other methods first.