FB Plus payment options?

So I have been thinking of subscribing to Plus but I have a question, that might be answered already. Please feel free to bash me in the comments ( 😂) but what are the payment options for it?

For instance, I would like to link the subscription to my iTunes account but is that even possible?

I want to do this because it would be the easiest way for me to pay, since (at least in my country) we hardly use any credit/debit cards. Don’t get me wrong, I have one but it’s almost always left without cash since I don’t use it often and any iTunes subscriptions are paid to my carrier provider, which makes it my ideal choice. However, I haven’t seen anywhere means of paying for Plus therefore I turn to the community for help ✌️

So, I guess that’s it. Thanks for your help!