AutoZone Does Not Refund (Money ******)

Went on the 26 November 2017 to buy a new Battery at 11:40 after phoning AutoZone Randburg where they confirmed they had stock. Went to buy the battery only to find out that it is the incorrect battery which costed R 990. So thinking it was a easy cash refund the cashier addressed me saying I have cashed up for the day and I must back tomorrow as it is closed. After asking and knowing that it will be a massive inconvenience concerning time, work arrangements, petrol etc. for me to come back to this particular branch I had to agree because I would like to have my refund. So I left the battery but I went with my receipt. Came to AutoZone Randburg at around 10:30am 27 November 2017 to be told they don't have enough money in the cashier and they will phone me later. Leaving very upset because I have gone completely out of my way and rearranged my entire day to sort this refund matter out. I then asked for someone else to call on my behalf at around 16:40 because no one has contacted me through out the day. Only for them to be addressed where they said they where busy and they have a customer in front of them with no apology and their money is put aside. AutoZone Randburg, using the word disgrace would actually be a kind thing to do in this regard.