What exactly do you mean by topup here?
You bought a new membership?
If so when does it start?
You bought an add-on?
If so what type?
You topped up your cash credit balance?
What does your My 48 account page say about your membership status, expiry date and allowance and cash credit balances?
What happens when you try to make a call?
What sort of number are you calling (e.g. what area code)?
Hope this helps.co