Nike India — Order cancelled but no refund since 30 days

I bought Nike Jordan size UK10 but Nike had to cancel the order as they were unable to ship it. When I initiated the refund process, they confirmed that it will take 10-15 days but it has been 30 days already with no way to find a solution with customer care.

Return initiated on 8th June, 2022
Order number - G[protected]

Have tried calling multiple times to both customer care and HDFC bank (my refund account) but no movement