How to file complient for cheating from company assuring services and do not do it

Hi i am hema and I am freelancer makeup artist i have came accross an website app in the name of saddidukun where they assured me to provide 20 clients for 20 thousand rupees with GST ...when i had rejected their services constantly later they assured me to provide one client who need 3 makeup session and her budject is 90 k for 5 thousand rupees it's kind of one click comission or one client commission ...so I agreed and payed the amout of 5 k for the same services through phone pay later on they asked few details like photos of my work and my e mail id and my social media handle to create my profile in their app ..later on I called them up and asked them when they will update with the assured client they told that I am supposed to pay rest of 15 k which is their package amount for one year ...i got so annyoed and told inspite of paying 5 k for only one client how I can pay rest 15 k within same week ...so I asked for refund and now they r telling that it is not possible and it's agnist their company policy where the fact is they had not even generated bill also for 5000 rupees ..which I have payied ..so here my concern is how I can file a compliet against them ..so that i can get my money back plz advice