At the beginning, the insurance was signed by the salesman, so the insurance contract was invalid, and no claims would be made in case of danger.

First of all, you can go to the insurance company to change your signature and re-sign it yourself, so that the policy can continue to be valid.

Secondly, if you think you don't want this insurance, you can also apply for surrender based on this signature and get back the money you paid at the beginning.

So, according to your own needs, choose how to deal with it. It is suggested that the first method be adopted to sign and amend the letter of guarantee so that it will remain valid.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.