Samsung — Delay in Refund

Order id : #[protected].

Date of order : 28th may'2020
Date of cancellation : 28th may'2020
I've ordered a mobile online, and cancelled it after 30 mins. I've received mail from [protected]@shopping.in. Samsung.com regarding cancellation confirmation. Alreday 4 business days have passed and yet i didn't get credit in my bank account. I'm trying to contact them online via chat, but no one is available to assist. Tried mailing them, except auto generated mail, didn't receive any intimation.