Terrible customer service

I placed an order on the 23rd and paid via EFT immediately, i knew there would be a slight delay for processing so did not check on order on 24 or 25th expecting it to have been processed by the 25th. I check my account on the 26th and the order has disappeared from my account. I call the call centre and get told it hasnt been processed because payment has not been done. I explained that payment was done same day. They ask me for proof so i send it but query why if the payment was done the order was not processed. I was told because the accountant does not come in every day or comes in late. So my order is delayed by incompetence. Absolutely shoddy service, will rather order from a competent supplier in future.