英语翻译非常抱歉,您在邮件中给我的电话我已经联系了一整天,一直是无人接听,如果需要的话,我会找机会上门拜访该客户,但是如

I called the phone number you gave to me in your email. But I'm sorry to tell you that, for a whole day, nobody answered my call. I'll find time to visit the client if necessary. However, it will be difficult to make the visit successful if we do not make an appointment through a phone call.

Sorry to bother you but I have been calling the phone number you mentioned in the email all day long and nobody answered the phone. I am willing to pay a visit to the client directly if possible but I think it will be more appropriate to make a phone appointment in advance.

I 'm sorry, but I have been trying to reach by the phone number in your email all day, and there is no answer. If neccessary, I will pay a visit to you someday, however, it will be hard to make it without a phone appointment.