Banks should be responsible for the losses caused by bank staff's work mistakes. Large losses can be litigated, and small losses can be resolved through consultation with banks.
The advertisement of this fund (whether in print or on the radio) will be marked: the investment of this fund is risky and the risk warning is sufficient. The customer decides whether to buy or not, and there is no responsibility of the bank. Unless you have evidence (such as the recording of the conversation at the time of purchase), the bank staff used inappropriate language when selling wealth management products to you, such as promising income, guaranteeing the bottom, etc., which led to over-marketing and misled you.