Since it took you so long to submit the manuscript, the tutor will think that you despise him and challenge his authority, and his heart is greatly respected. Not accepting your thesis is an inner pursuit of balance and a punishment for you. If you can't reply, it is understandable that you can't get a diploma.
Method:
Call your tutor in private, make all the compensation in private, and admit your mistake. Remember to have a good attitude, being hard is not good for you. Specific implementation measures:
(1) Investigate teachers' hobbies and whereabouts;
(2) Please have a meal (you can impress his classmates and pay the bill), and admit your mistakes when eating;
(3) Take the initiative to write a review for him personally and tell his leader that it is your fault that the teacher is so good (in short, the attitude is first-class and good);
(4) Continue to rub by time, go every day, I believe it will be successful, and my tutor doesn't want to make enemies. You should let him take all his anger out on you.
As long as the method is used well, it will definitely solve the problem, and I hope it will help you! !