[Resolved]  Stn Solutions — scammed

I got a call from a number regarding the online work .they told me to complete work in 10 days and get rs. 20000 .i agreed and they made some agreement and demanded otp for I'd creation so i have them and they sent me an agreement in which there was mentioned that if i want to cancel i have to pay them. So i called them regarding cancellation and they demanded rs 4200 and they told me the work is cancalled and you will recieve letter by half an hour i got another call then they demanded rs 6950 for cancellation letter . I refused. Please help me in this regard . I am a student and an orphan .please help me i am getting depressed