Dear Sir or Madam,
In your website I was told I was paying for a visa, why should I pay again in Vietnam?
Please be informed that when using Vietnam visa on arrival, you need to pay two kinds of fee: service and stamping fee. The service fee is paid online in our website to get visa approval letter and the stamping fee is paid in cash to the Immigration Officer at Vietnam airport to get visa stamped.
These two kinds of fee have been clearly stated on our website, at fee secton: https://vietnamvisa.be/#visa-fee-instruction.
We hope this answer find you well.