Wen ever i try to subscribe it says that this purchase is not available for this payment
Make sure you have enough money in your itunes account. You probably need an itunes card or if you have another phone or device get the points or dollars to buy it
I don’t really know about Itunes, but on android, Google play account money is not accepted. Only credit cards can be used for subscription. Because of that, I don’t have live as of when I wrote this.
If you are using GooglePlay you currently must use a valid credit card to purchase Live subscriptions. This was a Play store policy, but we have managed to work it out with them to accept other forms of payment such as redeem cards or store credit balance. That will be available in the next update. Until then I’m afraid nothing can be done.