Thanks for choosing Apple.
Dear Apatsanan,
Welcome back to iTunes Store Customer Support. This is Amaran again.
I reviewed your account and found that it has been exactly seven business days since the refund was issued. Refunds typically process within 10 business days of the refund date. Sometimes it can take a little longer. Please allow at least 4 more business days to pass and then call your card issuer again if you still do not see the refund.
Thank you for understanding and for being a valued iTunes Store customer. Have a nice day!
Sincerely,