Simplilearn — Simplilearn fraud

Hi guys, I may case I paid half worth 750$ its installment. At first the agent was very caring but once I make the payment no proper response. I can’t start the live class reason that I paid only half which the agent didn’t mention once you paid half you cannot start the live class. HE NEVER INFORMED ME! So my weeks are running without using the LMS. I’m very disappointed I feel there were something wrong.
I did research: his phone number +[protected] reported spam,
the invoice number never registered in GST REGISTRATION,
their address- NO OFFICE SHOW or IMAGES
They didn’t allow me to do the refund because its more than 7 days. Their policy was only for their benefits.
Please help how I can get my money back even if its only half still its money and i work hard for that.