Shoprite partying with customer's cash

On 18 December, I was making a payment via the Shoprite Send website, using my credit card. The first time I tried to make this payment, Shoprite's website told me that the beneficiary's details could not be verified and that the payment had been unsuccessful. I make monthly payments to this beneficiary, so the details were perfectly in order. But sometimes Shoprite's website doesn't work properly, and payments do not go through. So I proceeded to make the payment again. After the second attempt was successful, I noticed that two payments for the same amount had come off my credit card. Yet only one payment shows on Shoprite's system. I waited a day to see whether the duplicate payment would automatically reverse itself. It didn't. So I contacted Shoprite. I had to try a few times to contact them, as they are not very responsive. But eventually I received a response, and I supp**** all information they requested. This was yesterday. Today, there are still two payments coming off my credit card, but only one payment showing on Shoprite's system. Shoprite don't seem to be in any kind of hurry to rectify their error. Perhaps they are using my hard-earned cash to party their way through the festive season?