I want to ask the company to help me pay social security for one more month at my own expense. Who should agree?

This kind of thing, you'd better solve it through negotiation: for you, although the company made a mistake, the overall beneficiary is you; For the company, although it is legally possible to recover the amount of social security paid from you, there are still some mistakes. Therefore, we can negotiate with the company to pay more social security after leaving the company and only bear part of it. For example, maternity, unemployment and work injury can be exempted, because freelancers can't buy these three items, and pension insurance only bears 20%, which is the quota for freelancers. This is a fair judgment. If the unit is willing to make further concessions, you should take the initiative to accept it; If the unit refuses to give in, it can go to labor arbitration if it has time, and finally it can get a fair judgment, but it is only a few tens of dollars less.