Dispute Over Hospital Charges, Insurance Approval & Delayed Discharge

I need legal advice regarding a dispute with Max Super Speciality Hospital, Dwarka and HITPA/insurer over additional charges at my mother’s discharge. Hospital representatives informed us that IABP-related expenses (approx. ₹88,000) were included in the package. However, the hospital later demanded additional payment. HITPA’s final pre-authorisation states ₹17,556 as “procedure charge part of package – do not collect from patient.” We paid/are paying the disputed amount under protest to avoid further discharge delay. There was also an approximately 24-hour delay. I need advice on whether these charges were legally recoverable, our right to refund/compensation, whether the IABP representation is legally binding, whether the discharge delay constitutes deficiency in service, and whether liability lies with the hospital, HITPA/insurer, or both. I also need guidance on the appropriate legal forum, including whether a Consumer Commission complaint is viable, and what evidence is required.