1. I called to tell you the personnel of the company I applied for, and said that after in-depth understanding, I felt that this job was not suitable.

2. You can also use the method of case 1 to refuse. In addition, it can be said that I have found a satisfactory job and am currently working, so I'm sorry, I'm sorry.

3. This is actually the best refusal. You can say that you don't feel suitable or suitable after trying it out, so you won't come that day.