Where does it say this?
What is the exact error message?
Dial *100# and hit call - what does it say is your cash credit balance?
Handy short-codes
If it's €15 or more then text the word "mitch" without the quotes to 1745.
How do I buy stuff by text?
Does that confirm that your membership was purchased OK?
To avoid hassle with buying membership enabling auto renewal of your preferred membership type is a good idea:
Automatic membership renewal
Hope this helps.
