Yes Bank — credit card emi conversion frauds

Address: street, 560043

While opting for the credit card, it was mentioned that I can easily convert any transaction into emi for 3-12 months.
Considering that I used the card for a high amount transaction and asked the customer support to convert that transaction into emi.
The customer support has Reverted that 'Sorry sir the emi conversion facility is not available to your card' the bank has withdrawn this offer.

How can the bank be so much harsh to the customer and moreover they didn't notify me about the withdrawal even once.
If I would have known that I would have not done that transaction from Yes bank card.
I feel this as a cheating by the bank and seek support.