What are the Subscription options? And how to subscribe??

I bought my game through "Steam", and my free 30 day game time is expired.

How do i add a 30/90 day game time card to my account? The only option i see at the Mog Station is "steam wallet". But if i choose that option...it does not tell me how much money i need to add to my steam wallet.

So..i would rather just buy a time card from amazon, but under my account there is no payment options other than Steam wallet?

86 views and no one knows how to subscribe??

Try another browser. I'm serious, give it a go.