Changing Payment Method for monthly subscription?

I need to change the credit card used to pay for my monthly subscription. Such a section in the “account” page of does not exist. Really? Soo what do I do next? wait for an email saying the payment declined? my subscriptions auto-cancels? THwn what about all the math? what? Can someone help here. srsly basic stuff. cmon.

did no one respond to this even? Jeez these guys dont offer any support even when you want to pay them