How can one avoid “offering work performance” in case of dismissal protection action??

Hello, colleagues! Can any of you give me a tip on how one could “get around” the “offering of work performance” in the employment protection procedure after the termination date?? Let the sick write this would be one, but in my case is not so easy because I am (still) ill because of the consequences of an accident at work and that also not for long, because nobody else “plays along” anymore… Is there any other way that I can do my job with my former employee? If I am not sick anymore, he is obliged to pay me the salary until the final decision of the labour court (at least retroactively) and then he will certainly want to see me again for “work”, but just NOT for driving (because he has no truck for me), but for “other” activities, which he then comes up with… And since I had unfortunately only an oral employment contract, he could have me inside half of the company (at least theoretically) work for “anything possible” … So how can I still legally withdraw from his “access” without being ill written ??? DON’T YOU KNOW WHAT TO DO !!! Greetings