Once you have the remark other Consulates in the region, in 90% the cases, will not issue you a new Tourist Visa. As other members suggested a new passport really is not a big help. I'll not give a guideline on how to beat the system, but it is basically still easy to stay up to 18 month without major hassle, after that the air get's thinner. Reflect your situation and make a proper plan.

this is an assumption. There are various reason why a Non ED is refused.

you got a void stamp ?

it is mentioned on the info page that : "Please be advised that all dummy email addresses from Gmail, Hotmail, Live, MSN, Outlook and/or other email addresses will not receive email confirmation and will be automatically deleted from the system.

(Note: Gmail users may experience delays when receiving emails from our system.)". You just wait a while.

@Robert ******

let's wait. Annika made a good suggestion to try tomorrow again.

Singaporean can get unlimited entries by land. But at the end the Thai Immigration will ask themselves why this guy is not getting the proper visa?

@Julian ********

keep in mind that before Immigration there are no ATM.

with the correct paperwork from School or University they surely will help you get the extension into your passport. However without supporting paperwork they will give you only a 7 day denial stamp, means the extension is VOID.

page should be OK for Thai Immigration to get an extension placed.