Standard bank where is my money?

I purchased goods to the value of R1500 from Lisel Building Supplies in Benoni, however the goods were defective and I returned them to the store. I used my credit card to make the purchase.

On 13 October 2020, I returned the goods to the store. The finance person at the store indicated that the refund was done into my credit card account. The owner indicated that the money has left his account.

Until today there is no evidence of the refund. I phoned the standard bank call centre and was told that no refund was instituted by Lisel Building Supplies. The balance and transaction history on my standard bank app does not indicate any refunded money.

The owner of the Lisel Building Supplies has indicated that the money has left his account. He is not interested in assisting me with this issue and indicated that the problem is with my banking institute which is standard bank.

I have sent a message via facebook messenger and honestly I need somebody from standard bank to actually help me find my money and not state the obvious that no money has been refunded.

Where is my money Standard bank.