Prepaid: Worthless !!! My son did not top up on ti...

Prepaid: Worthless !!! My son did not top up on time and because he almost never calls, he has not received the message "you must top up within ... time" before he could call.
Now his number is blocked !! When asked why they do not send SMS with a reminder, the answer from the "help desk" was: No, that is way too much work !!! ???
Unblock number again when we top up: no that is not possible either!
Thank you Lebara ...... for this worthless service!