Simple Accountant's Letter for Schengen Visa

I am Mai, owner of Vietnam Inbound (Trading name: World Inbound Limited), a UK travel company servicing all East Asia and South East Asia countries. We are a high-growth business and have been in operation for over 4 months since September 2017. Our UK Entity Company Number: 10966352.

Lately, I’ve tried to apply for a Schengen visa to attend a travel expo soon. However, I am classified as the owner of the company or “self-employed” status, which requires me to have a letter from an accountant confirming my directorship / that the company is still active. There's no work that needs to be done here; I have composed and attached this letter so it just needs to be signed. As you can tell it is very simple in its content; with all information that needs to be confirmed being public on the Company House records; so there is no liability here. I just need an ACCA-accredited accountant (UK-based) to assist with providing this letter on their company letterhead and sign it so I can submit the letter along with my visa application. I need the letter quite urgently by this Sunday the latest; so your prompt quote is appreciated.