Hello, so I was promoting a game on mobile a few minutes ago and I put R$10 on a mobile promotion but it didn’t activate (show green button) like it usually did so I waited 15 seconds and refreshed the page a few times but it was still a grey button so I assumed it was a error so I tapped it and did R$10 again this time the green button popped up so it was running. However, I noticed I lost R$20 so I checked my account history and here is a linked image of the double charge:
Other details
OS: Windows 10 (1903)
Browser: Chrome 75.0.3770.142
UPDATE August 9th: I have contacted support and got my 10 robux back. This should still be fixed.