Skinnsi — Non delivery of services and no refund

Website: skinnsi.in

I have purchased the dermafacial services from skinnsi. Following are my Grievances :
1. They have not updated their system with these details and every time I try to schedule an appointment they request for receipts. It has been one year and the company cannot update the portal.
2. Appointments are fixed and no one turns up. There is no intimation for the same either.
3. When I had purchased the package I was promised a cashback by the sales representative within 1 month. that has never come through and they say that the sales person was fraud. I need that refund as well.