score:5
I emailed Lufthansa on Saturday. They emailed me back from the refund team on Wednesday, mentioning that I could change the payment method, while they will keep my ticket alive for some days.
I do not know if the refund team would contact me anyway, regardless of the email I sent to customer relations,
I had to call their phone center and provide my card info. After 20-30 minutes, the operation should completed.
In order to verify that, in my booking in Lufthansa, I had a "Not Available" for the e-ticket. Now, I have a new e-ticket.