Looking for logging into the Itunes Billing site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Itunes Billing site. After that you can login as usual with your login credentials.
https://support.apple.com/en-sg/HT205102
https://support.apple.com/en-sg/billing
https://www.apple.com/sg/shop/browse/account/home
https://www.apple.com/sg/shop/help/your_account
https://support.apple.com/en-sg/itunes
https://support.apple.com/en-us/HT201762
https://help.netflix.com/en/node/25097
https://help.netflix.com/en/node/27460
https://www.m1.com.sg/Personal/FAQ/General/AppStore-iTunes
https://help.pandora.com/s/article/Change-your-Payment-Information-1519949295577?language=en_US
https://www.singtel.com/personal/products-services/more/direct-carrier-billing/apple
https://help.hulu.com/en-us/update-payment-information