>> Yes, I fully intend to complain once we have no more risk with them.
Be prepared for a VERY tedious process. You have to understand that the regulatory bodies are government run departments who at the end of the day want to do very little work. Most of the complaints are swept under the carpet by a very simple tactic... create so much paper work and requirements from the complaining party that you abandon the complaint.
I've complained to various regulatory bodies and the first thing they do is bounce you to another one .. and the other one bounces you back. Next once you've put both on the line, they'll ask you for so much paper work, where you just give up hope and move on.
If you don't move on, then comes the issue of anonymity. Do you want your affairs becoming public knowledge (one of the conditions you have to agree to if you want the investigation to continue). Many people do not want to risk their names and details of the complaint becoming public knowledge due to various reasons - privacy, repercussions (do you want your current bank to know you're a trouble maker?) etc.
After you complain AND agree to the conditions of disclosing your name etc, then be prepared for long periods of silence "we cannot comment on an ongoing investigation".
All a spectacular waste of time.
When it comes to SMEs, do you want yourself and partners spending hours a week on dealing with them govt bureaucrats or moving on with your business??
Complaining and following up on the complaint can be a very slippery slope.
Take your money and your business where someone cares to work with you and move on.