Investors Clinic — Investor clinic Fraud with customers

I have booked 2- seats in Bhutani Alphathum Socket - Tower E through Investor clinic. During booking investor clinic has has provided me the GST waiver of 7.5% and my effective GST was 4.5%.

They have taken first 4 payments (Retention amount, 10% of booking amount, 30% of booking amount and retention amount) as per commitment, I have attached the payment plan for reference. But during the last payment which is at the time of possession BHUTANI is saying there is no approvals for GST waiver. So you have to pay 12% GST. Even though in BBA they have taken 4.5% GST for booking amount, they are not agreeing and asking more money.

I calling to investor clinic agent (Abhishek Kapoor) since many month Initially they told we will resolve the issue but now they are not responding on this. I have attached the complete payment plan for reference. Please resolve the issue.