Usave bad service

I received bad customers services at Usave today.I went to Usave at soshanguve falala Block F to buy items worth R64.88 inside the shop using my bank card.After inserting the pin and the money was deducted from my bank account their system shut down before my receipt could be printed. I then showed the cashier that on my internet banking account it reflected that the transaction took place,but they did not want to cooperate.Then I was told they were going to reboot their system so that my receipt could be printed. After they rebooted the system ,they told me that my transaction was not reflecting on their system and they rebooted their system again.I had to wait 42 minutes while they still wrestling the same system.after the 42 minutes they still could not print the receipt. Then the manager said to me that I must return the items that I bought and paid for with my own money and go back home empty handed and print the bank statement the following day and bring the bankstatement to USAVE at Falala and it is that then that they can give the items ,I bought. I payed R12 taxi money to go Falala Usave and I had to pay another R12 to go back home empty handed. Now I am told that I have to pay another R24 plus return taxi money so that I can go to town to print my bank statement.I want to know what shoprite management will do about this. The address of the Usave is Block F, 1 phumulane street,Soshanguve,0152,Gauteng. My cellphone number is ***. What happened to a customer being always right.