Edureka — Not refunding.Unethical behaviour

I had enrolled in the Devops program and found it very theoretical and useless. So after the first class have asked them to refund the money which they are not doing. When I call them they don't answer the call and lie that they tried to reach me on my number. I have raised a complaint to the support team and asked them to refund. Rather than refunding, they are asking me to join some other batch whose timing and schedule don't suit me. Also I had asked them specifically for my invoice with the break-up of the GST amount and they are always sending me invoices with out GST. I need an invoice with a GST break-up.