What happens if my visa extension application is rejected in Thailand?

Lots of confusion, but I give it a try.

as Foreigner you visit the Immigration Office to apply for an Extension of your temporary stay in the Kingdom, you need some documents and the fee for this application.

The Immigration Officer has a few options to do his job:

1. He agrees with your application and make a stamp in your passport with a later date.

2. He dis agree with your application and hands back all the documents including fee and tells you, sorry but the application is incomplete or you are not legible for this Extension.

3. He stamps the passport with Under Consideration and you have to come back on the mentioned date to get the rest of the time you asked for.

4. He not approve your application, stamps your passport, application not approved and gives you 7 days to leave the Kingdom.

When does your latest stamp expire?