I have tried to update my supscription on numerus occations without luck. I got the popup saying the supscription had been updated, but when I revisited the subscription the update hadnt taken effect. I tried from my Iphone (using safari) and from my Windows pc (using Internet Explorer 11) before I thew in the towel, canceled my current subscription and just made a new.
Today I was going to change my subscription again, and as before, the update didnt take effect despite the popup saying it had been updated.
As I was in no hurry this time around, I didn’t resort to the panic cancel subscription I did last time, but gave it a try using chrome, and it worked
So if you are experiencing the same trouble try with a different browser