Income received from Admission cancellation - Educational Institute - Goods and Services Tax - GST

Sir, Need a clarification on the following. There is an education society which is registered Under Section 12AA of Income tax act . The institution is receiving regular income from admission cancellation. And also getting income from Hostel fine (Other than hostel fees) from Students staying in hostel. Since there is no relation established in the educational institute and Student after admission cancellation, Whether the income received is taxable and can it be seen as tolerating an act/refraining from an act as per schedule I of CGST act.