Samsung — I want refund of my cancelled product which is undelivered

I ordered mobile from Samsung online website on 28 july and delivery was estimated on 1 Aug . So I wait for long time and call customer support of samsung 3 4 time every time they were saying your product will be delivered in next 1-2 days but it did not delivered . So I cancelled my order on 12 aug and ask for refund. After one day later I received msg from courier company that product has deliverd on 13 Aug. But it was not deliverd. So I again called to samsung and told them everything. All the time they only listen my concern as always ask me for waiting for 1 2 days to get refund. I also write to bluedart for delivery inquiry but they are unable to trace my order

So I request to help me to get refund of my amount from Samsung online.

Samsung Order id [protected]
Order date 28 july 22
Cancellation date 12 Aug
Bluedart airway bill no. [protected]