2 sentences

1. 请提前致电或发送电子邮件。

   qǐng tí​qián zhì diàn huò fā​sòng diàn​zǐ​yóu​jiàn.

   Please call or e-mail in advance.

   Source: CCMatrix

2. 请再试一次或直接致电我们。

   qǐng zài shì yī​cì huò zhí​jiē zhì diàn wǒ​men.

   Please try again, or call us directly.

   Source: CCMatrix