Myntra.com — OTP issue and Rude behavior from myntra

I am trying to use myntra credit as payment to place an order. But they are sending OTP on myntra registered number for placing order which is not active currently. So i am unable to get OTP and unable to place order.
When I called them, I asked them since I have my email id also registered so if I can get OTP on my registered number, that myntra person started talking very rudely and said there is no option. Then I thought of placing the order as cod, then what I could see they have increased the price of those products since they already knew I will be placing order. Now, my hard earned money struck up in myntra credit only which will expire.
I need my money back in bank account or need them to fix my issue on priority