You can directly contact me.

你可以直接联系我。

You can contact me via email.

你可以通过电子邮件联络我。

Please contact me via telephone.

请用话机联系我。

Please contact me during working hours.

请在工作时间内联系我。

If you need help, feel free to contact me.

假使你需要帮助，请随时联系我。

Please contact me if you have any questions.

如果你有任何问题，请联系我。

You can contact me through my e-mail address.

你可以通过邮箱地址联系我。

You can contact me through my cell-phone number.

你可以通过手机号联系我。

If you run into trouble, feel free to contact me.

如果你碰到麻烦，请随时联系我。

You can contact me whenever and wherever possible.

你可以随时随地联系我。