Re: "Initiate refund : I cancelled the auto renewal of the subscription but money is debited from my account and transferred to apple media services I want to initiate refund"
Subscriptions generally need to be cancelled at least 24 hours before the due date.
Wondering who was the receiver of your money for the subscription, so you know where to lodge your refund request.
You may want to first check whether or not the subscription amount is listed in your purchase history: View your purchase history for the App Store and other Apple media services - Apple Support
_______________________
If the subscription is listed in your Apple Purchase history:
You can: Request a refund for apps or content that you bought from Apple - Apple Support
__________________________________
Else: For a subscription that is not listed in your Apple Purchase history: See:
About purchases not billed through the App Store or Apple In-App Purchase - Apple Support
Eg: says:
"If you paid for an app, a purchase within an app, or a subscription outside of Apple’s ecosystem, contact the developer for billing support or a refund. Apple is unable to provide support for these purchases." (More info. in the linked article)
Support for purchases of Apple products, if needed: (info. / support / contact options etc.)
Website: Subscriptions and Billing - Official Apple Support