I looked at my payment info and now my itunes card balance has disappeared. How do I get it back?

10-11  Source: Network gathering  Views:2 

I looked at my payment info in itunes and I had a $15 itunes card scanned in. When I went to take my credit card off my itunes balance disappeared. I cannot find the balance anymore. I already threw the card away. How can I get my balance back?
Hello AB,
< Off Topic)
Can you answer me a question.   I clicked on report a problem to see what the page actually said ... and it came up with the details of my last iTunes purchase plus some personal details too.     Would you know if this screen automatically throws up the last individual purchase of whoever links to it ... and it is secure.
If this is an abberation would you have a contact link to get immediate attention.
Much obliged for your help.
Regards, 71.
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