Terrible service

I bought an adaptor cable at Unimart Cash & Carry Bushbuckridge on 17 September 2021. I used my cheque card to make payment but the receipt could not print. the cashier told me that the printing paper was not installed properly and tried to print again but still nothing came out. She then requested me to show her the sms on my cell phone to ensure that the transaction went through, i went to fetch the phone in my car and showed her the proof. she told me that i must go and print the statement from the bank cos that’s the only proof acceptable at that store. i refused citing additional charges that I will incur for something that was not my fault. I requested to speak to the store manager but she shouted at me telling me that she can’t help me without a bank statement. I went to report at the police station, went to the shop with the police, I showed her and the police online statement indicating the transaction from my banking App but still refused and said she want a printed statement, she told me that I must go home and wait till the transaction is cleared on my account then come back to the shop with printed statement, then she will give me my product. out of frustration I left the store without the product which I paid. now i have to suffer additional costs of printing a bank statement, which is a confidential document, and transport for going back to the shop to collect the item.

Please help.