i don't have any suggestions- just support and sympathy. I'm really sorry to hear what you're going through. My boyfriend graduated from NTU this year following a 4 year Internationl Business course, and has also had problems with his course tutors. They can use the excuse that they have foreign instructors (who speak somewhat broken english) since it's meant to be 'International' Business, but i really don't think it should affect a student's learning.
He also had issues with his dissertation tutor, who he was supposed to meet with at least twice. Well, they scheduled the 2 meetings, but the tutor got the dates wrong, and told him at the last minute that she could not meet with him past a specified date (which was something like 3 days before their scheduled meeting). Being dyslexic, it was of course a bit of a struggle for him. The tutor agreed to read over an emailed draft, but in the end didn't follow through. Luckily, he found another course tutor that he got on well with, and was able to discuss some of the issues he was having, and could rely on me to help sprt out the grammar side of things, but overall it was a very stressful experience.