Pathetic service and misleading info on app

There are two Checkers both within a 5km radius to my home. I needed specific items. Called the Checkers branch at East Rand Retail Park and was informed that they did not have all the items I required. I then called the Checkers Hyper Boksburg branch. Was informed that they had the items in stock and do deliveries to my location. I then placed the order on the app, was charged a pre authorized amount of R532. 38 for 6 items however when I received delivery it was from the East Rand Retail branch and only 3 items delivered amounting to R167. 97. When I called the help line I was told that the closest branch delivers and it will take between 2 - 5 days for the adjustment to be made to my bank account. I'm totally dissapointed because I'm sick in bed and dependent on the delivery. These items by the way did not show as being out of stock on the app and why does it take so long for the refund?