I bought robux to xbox but i didn't robux it got error and charged me and i didn't get my...

You would need to talk to the roblox publisher. Here is a link to there help page that deals with your situation.

Roblox help page

I purchase robux as well. My bank was charge but did not get them.

I bought a roblox add-on (400 robux) thanks to microsoft rewards, i recieved the email of the payment but didn't get any code (giftcard code i suppose) so i can't reedem it. What should I do?

Hello,

My son just redeemed his $15 Microsoft gift card and bought 1200 robux money but it is not showing up in his account. It's sayin he still only has 3 robux. Any ideas what is going on? I got the email that the card was redeemed so it seems to have taken the
money but it's just not showing up in his robux account....

Thank you so much for the link to this website! It shows me the option to buy 400 Robux for 4.99, which I can save up for.

However, I was concerned due to the fact that it says "400 Robux for Xbox" and the description reads "To redeem after purchase, launch Roblox on Xbox and sign in to your account." Again, I don't own an Xbox so will I be able to redeem the Robux?

(Usually when I get Robux through Microsoft Rewards, it gives it to me as a Roblox code, which I can redeem online, so if this is the same it should be fine)