Arena Animation - Misleading Scamming and Harassment

I'm the student of Arena Animation I was doing a diploma cousre names VFX Prime but later in new degree course has been introduced in my Institute so I showed them intrest for this degree and they told me that whatever you have paid in your VFX Prime course that amount will will adjusted in degree course except tax to which I agreed after so in October **** I enrolled in Degree called B.Voc but after * year when I have almost submitted my whole fee they are asking for more by saying that the amount which have to be adjusted thats not possible now after * year pls let me know what I can do