Refuse to close your account
If you put your money there be prepared to loose access to your funds for weeks or month at any point in time.
I am trying to close my account but N26 is trying every trick possible to prevent me from doing so. 
I have respected the terms and conditions for the termination but suddenly they need more verifications arguing it is due to the amount of money in the account... then their latest trick is that the IBAN of my French account doesn't work to transfer the remaining funds, can you believe it ?
it's been 3 weeks and I still can't close my account... made complaints to the BaFin and ODR but it's going to take month before they force N26 to close my account.