We sent them an email asking them to check and complete the transaction, since the money was received in their wallet. But just now, after 5! days - I received a message that such mail does not exist!
support@sinbad.ioThree or four people have already asked you simple questions about the situation, and you haven't been able to answer with a simple "yes" or "no".
If your attitude is the same when trying to contact support, it will be difficult to help.
Allow me to try an alternative route. I've send them an email to the address, let's wait if they replied me or if his transaction went through [whichever comes first]. If there's an issue with the email address such as what he described, my email should also be failed to reach them. If it does... well, we clarify at least one thing.
I wanted to do the same thing, to test their email address. Did you get a reply yet? Generally, it does not take much time to get a response from the server if the address is not correct.
They have another address on the website, has it been checked as well?