Unhappy Customer

I made a purchase on their website and payed with my card, the transaction went through but it seems that there was an issue with the website, and i did not receive an order number. After calling their call center i there after communicated with Penny at Geewiz via email. After Indicating to her several times that i do not have and order number or reference and providing her with a Bank statement reflecting the payment, she still asks that i provide her more information. WHAT MORE INFORMATION CAN I SUPPLY INDICATING THAT A PAYMENT WAS MADE TO GEEWIZ OTHER THAN A BANK STATEMENT. Cant the accounts/finance department see that a payment of R664 was made to Geewiz reference/order number or not. Whats the chances that another item was purchased on the Geewiz site with the delivery charge is exactly R664. Therefore i do not understand why Geewiz cant seem to find this payment made to them.