RP purchase

hello everyone , i have been trying to use my card to get some RP in the client but it get me Error without real clarifications , i have contacted support and they told me i need to disable my anti virus and put some paths in firewall which was kinda stupid tbh , how is windows defender interupting the purchase with my card doesn't make any sense , so please if possbile does anyone has a legit website where i can buy gift cards t o get some RP please LEGIT , i have looked and i saw many poeple got scammed on games from G2A which i don't know if they already sell RP gift codes so guys if possible anyone can help me and tell me a legit seller or atleast verify with me the Error only i got whitout stating any informations or if someone had this issue before and found a solution to it because i am sure my card has money and somehow i get Error even after succesfully verifying using SMS code , i am really confused...