Dear Diljeet SIngh,
It is informed that we JUST can help you to process 1 month single tourist visa for you and the service fee is $150US/person (not including $25US stamping fee at Vietnam airport). However, the Vietnam Immigration does not process 1 month visa for full 30 days, they just base on your ticket to process visa. The processing will take 10 working days
And you can apply for a Visa on arrival online at this link: https://www.vietnam-evisa.org/apply-visa.html
In addition, after finishing payment online, please send us your passport scan + hotel booking + return ticket + The first page of your credit card which you use to pay to us via email email@example.com. Without those documents, we cannot process a visa for you.
IMPORTANT NOTICE: We can help you to process the approval letter to get visa stamp at Vietnam airport. However, the Vietnam Immigration requires you must have more than $1000 USD in order to enter Vietnam. Therefore, you must show in cash or give your card to the Immigration Officer to check if you meet this condition then can continue to do the visa stamp procedure. Please prepare this amount before your departure.
Moreover, Afghanistan passport holder is not applicable for Evisa
Scarlette Le (Ms.)