I just bought my friend 30 dollars in gift cards f...

I just bought my friend 30 dollars in gift cards for roblox, the help page or whatever they recommended on the phone, said nothing about what my problem was. I had redeemed my friends ROBLOX card and we still had five dollars left. Then we went to check out another item that was $4.95, It s sad and unexpected error occurred please try and request again later. We have been we trying this and another answer that we have gotten is this ROBLOX card is already been reall it said an unexpected error occurred please try a request again later. We have been we trying this another answer that we have gotten is this ROBLOX card is already been redeemed. If anyone can help with this. I ve been on ROBLOX for a while and this is my first experience with a gift card. It s horrid.