Unsuccessful signup but amount charged

I tried signing up today via the mobile app in iphone, but it was very unfortunate. The problem is, I tried yesterday via the web, but I couldn't get any verification code, so I left the process in the middle.

Now, I can't sign up via any platform or device. What is more unfortunate is when trying via mobile app, I also paid 6.49 USD for a month, but I am not even a registered user. I have raised a ticket, but I am not too happy about the whole incident and process. What is the workaround for a situation like this, other than waiting for the support?