Why isn't PayPal showing up at checkout in my online store?

Hi, we are trying to develop a store . ( store url : https://zishta-store.myshopify.com/). We are not able to integrate PayPal i.e. even after activating PayPal we are not able to get PayPal payment option at checkout.
A few points to note here:
(a) Merchant already has PayPal business a/c and is accepting money through it for international customers through their existing site.
(b) Address at Shopify and PayPal a/c are same.
(c) Store is located in India.

(d) We are redirected to PayPal site but not getting “I give permission…” , I guess that’s because we are already accepting PayPal payment through that business a/c.

please guide us on this. I’m really badly stuck on this. Thanks :slightly_smiling_face: