My Gift Card Not Working

I bought a 70$ vanilla visa gift card, and i assigned a zip code to it. I go to LOL, and i enter all the information correctly. i checked multiple times. I made it VISA at the top, i wrote the correct card number, expiration date, and the cvv ( 3 digits at the back). I wrote the assigned zip code with my name because it dosent have a name on the card. I did this multiple times and it said error, transaction declined. lmao i got tilted and kept doing it, and it eventually said error, use another card or wait 24 hours to use this one. Can someone help? Or is it just gonna work after 24 hours? thanks [slayer-jinx-catface]