What exactly was the payment for - i.e. What did you buy?
A membership plan, an add-on, or cash credit?
What does your Transactions page say about the payment?
Does your My48 account dashboard list an active membership plan?
When were you last able to successfully buy a membership plan?
Is your payment card still valid, not frozen via your online banking, and there are sufficient funds in the account if it's a debit card?
If you need to contact 48 support about this then see the links in my signature below.
