Dear Julia Kamau,
Thank you for contacting with us,
This is to inform you that we are service provider of visa on arrival which is only for those go to Vietnam by airlines. In case you are going to Vietnam from border gate, kindly apply visa at the nearest Vietnam Embassy or Consulate.
Hope that it helps.
STILL GOT QUESTIONS
Extend visa in Vietnam
1 month: $60
(for Chinese and Laos, Cambodia: 15 days)