What exactly do you mean "topped up"?
Cash credit balance, add-ons, membership?
What does your My 48 page say about your current membership status, expiry date and allowance balances?
Does it list a "next membership" and start date?
https://www.48months.ie/my-48
What does your My History page say about your payment/purchase/topup?
https://www.48months.ie/my-48
Remember that if you have used up your current membership allowances then buying a new membership will not help until that membership expires and the new membership can start.
If that's not immediately then you need add-ons rather than a new membership to tide you over to the end of the current membership.
Hope this helps.
