My apologies for the delay in getting back to you.. Took me some time to find the company who owns and operates Superslots..
Tinyco, is the company who operates Superslots.
And if you have encountered a bug with the game, facebook cannot help you.. Only Tinyco can.
What you need to do is submit a support request, make sure to name your facebook account and email address.
Make sure to mention how many credits you had, and when they dissapeared..
And then submit the request.. Then, the support team at tinyco ( the only ones who cn help )
Will look over your request and then work to fix the bug that removed your credits.. And then, replace them for you.
The link below, is the exact link you need to fill out the submission onhttp://support.tinyco.com/anonymous_requests/new
If you have any further questions, please let me know.
If my answer helped, please click one of the smiley faces to rate the solution, and then click the green accept button to accept the answer..
If my answer did not work, please wait to rate the answer and also wait to accept and instead send me a reply so that I can continue to assist you as needed.