Insurance law and regulations when applying for insurance: require your signature.
However, we must admit that there are always salesmen who violate regulations or ask customers to take them home for their husbands to sign, but the husbands are not at home and do not sign on their behalf.
So insurance companies have preservation services to deal with these problems.
If you do not have your signature due to special reasons, you can re-sign it, but you must bring your ID card to the counter to re-sign it.
After reading your description, this incident cannot be used as a reason for full surrender.
Full refund is only possible within the 10-day hesitation period.
Extended reading: How to buy insurance, which one is better, and step-by-step instructions to avoid these "pitfalls" of insurance