[why can't i buy lindens]

Similar thing happened to me this week. When I looked into it my card (Mastercard) in the UK had added a new "Security feature" which Linden exchange does not recognise so crashes the transaction. Spoke to the bank who said it was an issue with SL, so will raise a ticket and see what they say.

 

[I cannot find the submit button when updating my card details]

I have been attempting to update my card details, but when I enter them I cannot find a "submit" button, can you help?