i choosed wrong entry checkpoint and exit checkpoint

Dear alex lau, 

With Evisa, you have to arrive the exact port you applied. 

So in this case, please apply for the new evisa that match your itinerary

And please go to this link to apply: 

https://www.vietnam-evisa.org/apply-e-visa.html

after making payment, please send us your passport scan + 1 passport photo with white background, we need it for visa processing

And please note that once you applied for E-VISA, it will be non-refundable for any reasons, even the Vietnam Immigration processes your visa with wrong information  

Thanks

Scarlette Le (Ms.)