I had a dispute with Grow Your Invest (growyourinvest.com) and went to their complaints process. They have an internal team that just defends the company. Then they said I could go to an ombudsman - but the ombudsman they use is industry-funded and rarely rules for the client. The system is rigged.
Pros: Clean UI|Wide product range|Quick verification
Cons: Mobile app could be improved|Wait times can be long during peak hours