Hi deepti245,
welcome to the Apple (user-to-user) Community!
Re: More than 60 days and I haven’t received any refund
We are all Apple users, like yourself, in the community. No-one here has access to your accounts or details in order to check this out for you.
Seems refunds are made to the same payment method that was used for the purchase.
eg: You may need to check through statements from your card-provider, or check with them if the refund hasn't been processed and hasn't appeared on your statements.
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Re: how much more do I have to wait?
See how long refunds from the App Store or other Apple services generally take:
Check the status of a refund for apps or content that you bought from Apple - Apple Support
How to: Check your Apple Account balance - Apple Support
If needed:
See the Billing and Subscriptions Support website (info. / support / contact options etc.)
There's a "Get Support - start now " link (online chat / phone / email etc.)
at the bottom of their webpage (link below)::
Subscriptions and Billing - Official Apple Support
All the best :-)