illegal argument exception when trying to save card details to get a minecraft realm

Hi support,

Im trying to get a minecraft realm for the first time using the free trial but i have to enter my card details for that.

The problem is that when i enter my card details and save it i get an error. Similarly when i use another credit card. My friend has tried as well and he has gotten the issue as well....

Could i please get some assistance?

Many Thanks
Mustafa