First, go to the bank to communicate the situation and clearly tell the bank that you don't need insurance products. At this time, you can hint that you are going to complain to the insurance supervision department. In the meantime, you should collect evidence of rights protection, and it is best to record it quietly or collect other written proofs.
The second is to complain to the local banking supervision department, which is generally located at the provincial level, either by telephone or through the Internet.
I hope my answer can help you successfully defend your rights. If you are not clear, you can consult in the station. Good luck.