You'll need to explain the problem more clearly.
How exactly are you trying to add credit or buy a membership plan?
What steps are you taking?
What happens/goes wrong?
Any error messages?
What do you mean by "it's not accepting my bank PIN"?
The process for buying stuff on 48 doesn't ask for your bank PIN.
If you need to contact 48 support about this then see the links in my signature below.
