Amazon.in — refund not received although item is successfully received back by seller.

Sir, i have booked a sanyo led tv on dated 07/06/2020 order no[protected] on amazon by making payment through net banking (Oriental bank of commerce bank, gorakhpur branch). As the delivery of the tv was rescheduled two times on my request it was returned back to the seller instead of delivering to me on sunday i. E 14/06/2020 as i requested to deliver it on 14th june 2020 i. E sunday. On returning back to the seller refund of rs 22/- was done as it was paid from amozon pay on 14/06/2020 balance rs 11477 which was paid by net banking has not been refunded by them. On making query by me they provided me refund reference number[protected] and said they have already issued refund but till date amount was not credited to my bank account.
I request you to please look into the matter, thanks.