@Ashwin *******

yep

Whatever visa/extension of stay you're currently on will become invalid if you don't return by the 26th. If you're on an extension of stay based on employment then you need to speak to your employer as your right to work in Thailand will be revoked if you don't return by that date.

To solve the flight issue book your Turkey flight for whenever you're planning to use it.

Then either buy a cheap throw away ticket to SG or Phnom Penh (wherever is cheap basically) to show you're leaving Thailand before your tourist visa or visa exemption expires or buy an onward ticket from a website which deals with them. I haven't used any but others have, Google will have plenty of suggestions for this part.

@Terary *********

it gets worse

Not sure if visas on arrival can be converted or not.

If they can then you need to speak to your employer as it will be dependent upon them and the immigration office.

@Mark **********

I agree completely

@Mark **********

presumably because he's using her as his means of staying in Thailand

@Peter ***************

the website you referred to is wrong, it talks about buying this "visa on arrival" in advance for eye watering sums of money. The attached provides the actual days, including from 1 October.

@Peter ***************

15 days at the airport. A tourist visa obtained outside Thailand would give 60 days

@Daniele **********

you'd have been better asking them not to stamp those pages instead of doing what you did.