How can I dispute a payment made with a business credit card?

Ask the merchant for a refund. In the event of a dispute, you can challenge the payment via www.macarte.be. 

Did you pay with a Mastercard Gold? Call +32 664 46 25. 

The following information can help you identify a payment:
1. Check the payment date. Did you make a payment at that time? It is possible that a payment has not gone through yet.
2. Is someone else using your card? If so, has that person made a purchase recently?
3. Do you have a current subscription that you pay for with your credit card?
4. Look up the merchant's name. The information you find may help you identify the payment.