Bigbasket.com — inappropriate and arrogant service

I placed an order on big basket and when i tried using the cashback offer through airtel money on bb app it gave an error. I has already chosen my delivery slot for 9am next morning which is suitable to me and esp since the order also contained baby food which was required urgently by morning.
I called bb and explained the problem to executive. He cancelled my order mentioning that i can try paying again through airtel. Money and avail offer. It failed again. However in the whole process not just my order was cancelled, even my delivery slot got changed to evening which wasn't acceptable and not confirmed to me as well.

Supervisor mohammed came on line and surprisingly did not offer any solution and completely ignored my problem arrogantly. I asked for same delivery slot or provide compensation however he denied and said big basket cannot do anything to help me.

What problem i called was left unresolved and ignored completely and on top they cancelled. My order and denied me any solution and compensation. I asked for grievance id and supervisor mohammed said they can't give any details to customer.

I need strict action against supervisor and executive and also compensation from big basket.

Big basket order: mmo[protected]