Think twice before using the online store

I placed an online order on the 17 Aug 2020 for R810. The money came off my bank account but my online profile showed no order in my order list. I was told to send proof of payment, which I did. According to Forever new there online department takes 1 to 2 working days to respond. In that time I found more items that I wanted to buy, totally R815. I was hesitant to make another purchase but I was assured via email that during the week other people placed orders and had no problems with the online store. So I placed a 2nd order on the 20 August, using a different bank card from the first order. The 2nd order went through with no issues. The money came off the different bank account and an order invoice was generated immediately. Accounts department confirms that the proof of payment sent to them of R810 appears in there account on the 17 August. So the accounts department takes it upon themselves to cancel my 1st order of R810 and link the 17 August payment to the order placed on the 20 August. How does that make sense. The first and second order are for 2 different amounts and for different items. And who in their right mind would put money into Forever new bank account on the 17 August but only place an order on the 20 August. So basically forever new has ****** the money that came off the different bank account for the second order. I called forever new head office and spoke to Kyla. I asked her does it make sense that a payment for the 17 August will be allocated to an order placed on the 20 August? She insists its correct. So I asked to speak to someone else to explain the situation. I was told its escalated and she does not know when someone will contact me. I have everything on email as proof. So how forever new can cancel my order and not honor what they said they would do is beyond me.