Reliance Fresh — Gpay money paid twice but not returned

Last Saturday I bought things from Reliance smart point - Iyyapanthangal new branch in oil mill road, I paid gpay Rs 466 at the time it showed processing msg so they ask me to resend the money so I paid it twice after the confirmation of them .. they ll return the money if it paid twice and I attached the photos as proof and but no use I dint get back my money so I visited the shop again by next day by showing money debited msg from my account twice and they said lethargically, we ll confirm with manager once n they ll return within 24hrs. Now 3 days gone but the money not received yet. I called them to mobile number given by them but no answer. Tell me how long I want to wait n when ll I get back my money?!