What happens when you try to buy a membership plan with your new card?
Any error messages?
If auto-renewal previously failed because your old card was no longer valid then, after configuring your new card details, you'll need to buy your next plan manually before auto-renewal will take over using the new card from next month.
In that situation auto-renewal won't buy a new membership automatically until you kick start the process by buying your first plan manually.
If you need to contact 48 support about this then see the links in my signature below.
