Can I get a refund if I pay social security money now?

You can't. Agricultural insurance and social security are two different insurance systems with different nature and management methods. Agricultural insurance refers to rural residents' endowment insurance, medical insurance and industrial injury insurance, which is a social insurance system that rural residents voluntarily participate in, while social security refers to urban employees' endowment insurance, medical insurance, unemployment insurance and industrial injury insurance, which is a social insurance system jointly paid by companies and employees. Once they start paying, they can't stop or surrender at will.