Personal information shared without concern

I'm frustrated with standard bank unprofessional behavior. I received a contract which is not mine and it has personal information for that person. Definitely they have sent my personal information to someone else. This is a bank that always advise us not to share our information. I've tried to communicate with them on the 10 Jan 2021 they did not reply or email me correct contract. I've contacted them on the 18 Jan 2021, I spoke to three call centre agents, I was promised they will email me correct documents and contact me back because I need answers but nothing happened to date. No contract, no call. Where can I report this matter.