Your post was blank @HelenaB2844 so the precise nature of your issue isn't really clear.
What exactly do you mean by "can update payment"?
Did you mean "can't"?
And are you trying to update the payment details registered on your My48 account?
If so, then what happens when you try to do that here?
Any error messages?
If you need to contact 48 support about this then see the links in my signature below.
