Absolutely demented. Apart from that they refused to send me a machine-readable copy of their response to a DPA request for my records and the support team behind their app literally ghosted me when I kept politely pointing out the inconsistencies in their arguments.
Bonus: when I complained they used someone else's name when responding to it. When I complained again they sent me their response to _a totally different person's complaint about a totally different thing_.
Eventually I went back to First Direct (which is owned by HSBC). Avoid Monzo like the plague.
This is true of basically any financial institution.
Of course, it is a problem that Monzo had a bug that caused your account to get flagged for this.
Ended up going with Nationwide, who are a bit behind tech-wise (they do this weird thing where they ask for 3 digits of a 6-digit PIN I'm supposed to memorize, which seems far less secure than a long random password in my password manager), but generally have been great. I tried to sign up for their student account, got told no and redirected to their no-credit-check account with no issues. (That's probably also an indication of what went wrong with Monzo.)
I "bank" with them. Sensible. Reliable. Well run. That's preferable to the latest flashy technology when you are talking about people's hard-earned and long-saved money.
[0] https://www.bbc.co.uk/programmes/articles/2qS0HM6nBkcPMx0W8t...
[1] https://www.resolver.co.uk/freeadvice/companies/monzo-compla...