Myntra.com — Convenience fee

I have tried to make a purchase of RS. 2000 from the myntra portal, but I was charged a convenience fee of Rs. 149 because my previous returns were high, I have a Rs. 786 in my myntra credit and if I'm not willing to pay the convenience fee and do not want to purchase anything from the website, there is no option to transfer that amount to the parent bank account. Clearly, Myntra didn't mention anywhere that it will be charging a convenience fee when any product was returned. Secondly, the product was returned not just because of any unnecessary reasons and fault is on Myntra's side too. For an instance, once I have ordered a night suit set and I was supposed to receive both a shirt and a pant, wherein I received just a shirt and not a pant, in such a situation I would obviously return the product and it would be unethical on Myntra's part to levy a convenience fee. There was also an instance, wherein the product I received was completely different from the product that I ordered. I have also spoken with their consumer care personnel several times, but didn't receive any positive response from them. I just want the convenience fee removed on my future purchases or it would be much better if my credit amount can be transferred to my bank account so that I won't be ordering from Myntra anymore.