Regarding refund of security money paid to the school

Dear Sir, I admitted my two daughters in a private school ( L P S Global School) in Noida in July 2017. During the admission time, I had paid a security money amounting Rs.1,00,000/- (Rs.50,000/- for each) in respect of both daughters. They completed the academic session 2017-18 and 2018-19 in the same school. I have also paid the admission charges and fees in respect of both for the first quarter of session 2019-20 (April 2019- June 2019). I received my transfer order in May 2019, however not sure about my movement i did not give notice to school immediately. After summer break, i did not send my daughters to school and sent a notice to school on 27 July 2019 about our movement. Now school is refusing to refund the security money quoting that first we have to deposit three months fees for the 2nd quarter i.e. July 2019 to September 2019, then only they will refund the fees. Can you help me in this case.