I was with them when they were still a frontend to Wirecard Bank and called Number26. Not sure if it's gotten better since then but their support was much more

I was with them when they were still a frontend to Wirecard Bank and called Number26. Not sure if it's gotten better since then but their support was much more unprofessional than any other German bank I've ever dealt with. It's important to notice that we have so-called direct banks (i.e. without a physical branch) for a few decades now and the competition had a long time to work out their processes. Number26 was unable to provide actual, immutable account statements. They generated some PDFs for every month but they were often retroactively changed on certain events (e.g. if a merchant cleared a transaction more than seven days later). I was unable to get someone there to even recognize the problem. Their terms of services stated that foreign currency transactions were converted using a data source made available to both parties. Naturally I asked for access to that data source. The one linked in the FAQ didn't match my actual transactions and was missing some currencies I used completely. Once again, support was unable to understand the problem at all and repeatly said that Number26 doesn't have access to the fx rates they use either. So much for the contract they themselve drafted. I then closed my account shortly before the switchover to their own bank. The new terms said that transactions might not be processed on certain days announced on a paper at their Berlin HQ which I found pretty amusing (and have never seen in other terms). Hopefully that has changed now as well.