Hey, I'm also from Venezuela so I can help you a bit
You can't buy gold with a conventional debit card, the only cards you can use to make those types of purchases online are Banesco, Bancamiga and BNC, with the new ones issued by the previous banks
The above is not easy because there are requirements such as having large amounts of money movements, but there are other alternatives such as using Zinli or Wallytech cards, these are recharged by Binance or El Dorado, these cards are affiliated with a PayPal account (creating it is free, it has no cost) and you can buy gold through PayPal which in turn takes the money from the cards I mentioned
I hope this is not considered off-topic, it has a lot to do with buying gold for the game XD