Question about DTV visa proof of 500,000 thb

Hi been trying to ring the thai embassy in the uk but they don't answer or answer emails.So I have had to cone to redit so hopefully someone knows.I need to prove 500,000 thb in thr application for the dtv visa , it's says this can be a bank statement or proof of liquid assets.I have the money in the s&p500 which I could sell and have access to in 3 days.I googled the definition of a liquid assest and stocks are a liquid asset.I don't really want to sell my stocks put them in cash in my account if I don't have to.I can show my the balance of my account is well above the amount needed.But like I said the embassy don't answer the phone and are about 500 miles in the car.Anyone have any idea.Could I make the application get rejected then apply again or would that ruin my chances? Thanks.