Mainly depends on whether you have a labor contract or employment agreement at the beginning. If there is no labor contract, leave evidence that you work there. If there is no agreement, only an oral agreement, this matter will be difficult to deal with. 300 yuan is not cost-effective, and the lawyer's fee is not limited to these. Let's talk things over. What's more, he has been fulfilling his obligations. It's only a matter of time. Let's talk it over.