my deposits are not credited after 5 confirmations
Have you contacted their customer support? As per item 7.2 of their terms and conditions, bitcoin deposits should be credited automatically after 1 confirmation and you already have 5. By now, it will have more than that. So they say, if it did not arrive, contact their customer support.
The OP here is still active so if it has not credited in your account, maybe try to reach out also to him.
That's already an issue which might really spark out negative impressions but since they had just started then lets make out some considerations and there might be still some few adjustments needed for this one.