Fruit and veg no customer service

Purchased items and when I paid using my debit card, the card machine battery failed just after I received payment confirmation. I was told the amount would be reversed. I paid with another card and they said they would call me in the morning to verify the reversal and never did. Went in 3 days later to show them nothing was reversed. They request a statement which I emailed. They then wanted a statement of the second d payment which I showed from my mobile banking. They wanted a paper statement even though the cashier that assisted me could corroborate my second payment too. Needless to say customer service levels suck with FRUIT AND VEG. They just lost a customer forever. I purchased other items and paid for it but just left it there in frustration. Is R200 really worth letting go of customer that easily spends 6 to 10 times that amount a month with them