Myntra.com — charging gst over and above mrp ; retain customer money and force customer to buy product

I did shopping in the month of december from myntra, returned some of the product, which are of very poor quality, wrong product received, specification of product were different on website vs actual.

When i returned the product they provided credit to myntra credit saying its quickest but not specifying that later you cannot withdraw money in bank account. Now once they already credited the amount to myntra credit they mentioned their that money cannot be transferred you have to buy product to utilize the money which is fraud. They should have mentioned that information at the time of return.

Nowadays they started asking for delivery charges for each and every order that to where they retain customer money in their account. They are like fraudsters keep asking for extra money beneath other terms.

In sale they show discount and then they charge additional taxes as lumpsum amount in total, not even specify how much percentage, which tax and to which product.
When i asked to customer care they were not ready to share information of tax bifurcation which is incorrect and they just keep transferring call to their supervisor. Supervisor only keeps on repeating that dont have authority and its not as per policy.

Even customer care executive also not good and friendly. They are like robot keep on repeating same thing.