The Simpsons Tapped Out, update through App Store asking for payment?

I am a daily player of TSTO, but I can't update cause when it takes me on to the App Store it's saying "sign in required" and then taking me to my account for billing information. Even though I found this strange I went ahead and put in my billing information. When I click done it's bring up the message "Your payment method was declined, please enter another payment method"?!? I have NO IDEA why it's even asking me for any sort of payment in the first place as it's a free game, and how could there possibly be a problem with my payment method as I use this exact same payment method everytime. Nothing has changed, card hasn't expired etc... I contacted EA Support team at first, and they said the exact same, it shouldn't be asking for any sort of payment! They advised me to contact apple but being from the UK this is pretty much impossible. There is NO way to contacted them about this sort of problem without having to pay an arm and a leg to phone them! I managed to email them through some sort of help thing that I now can't even find, but it's been 2 day's and still no reply...

If anyone can help thanks to you in advance 🙂