Fraud by third party education services

Hi ! Last year I gave 18000 to a third party education company in Gurgaon to provide me admission in Distance MBA in a university in June 2018 batch. After that I have been calling them for proof of admission or books by university but they always say you will get in 15 days. 2 months passed and I asked them to give me a proof of admission from university, they said we will confirm from out end so they sent me a mail that I will get conformation in Feb 2019. I found it strange as no university gives admission , syllabus and books info before 3 months of the exams (June 2019). So in May 2019 after many calls and harassment I came to know from them my admission got cancelled and they will put me in other Dec 2018 batch. I was very disappointed that as a student my year got wasted, this was very bad for my career. Now till date I am fighting from them for my 18000 refund and they are just being rude on call to me and saying you will get after15 days, 20 days etc. I am really helpless what can i do ?