Myntra.com — issue regarding refund service

Have cancelled a product for which refund was initiated by myntra on 10/04/2019 and they provided me a reference number but still the amount is not reflecting in my bank account and they said that there is no such process.
Reference number (74332749102910142128993)
Is of no use as bank can't check through that.
Bank says to contact myntra for this and myntra says to contact bank.
I want my issue to be resolved as soon as possible