Why is my credit card not working for purchasing UE4?

i am from saudi arabia and i want buy UE4 but you are refused my crdit card why that i tired to try every day with my crditcard please give me a solution to download UE4 by crditcard or some way to do it and i have account by email just help me please to buy it

Hello,

You will want to contact our accounts and billing department. Their email is billing@unrealengine.com. If you send them an email describing the problem, they will be able to assist you further.

Thanks,

it wont work please help me