If you have an iCloud subscription, you will receive a monthly bill from Apple, check your email box.
You pay monthly for iCloud storage.
Check Apple invoice since when you paid the double price, 2 x 64,99 TL = 129,98 TL
For example:
If you scroll down on the invoice:
If you have any questions about your bill, contact support. This email confirms payment for the iCloud+ plan listed above. You will be billed each plan period until you cancel by downgrading to the free storage plan from your iOS device, Mac or PC.
So please contact support, by clicking on your invoice.