hi , I am trying to make an online appointment for an extension of my retirement visa at Bangkok immigration office but I hv been checking on the website calendar for several days that the whole December n January are fully booked. all the dates are shaded.

the notice said all appointments till January 17 are full n shaded and so are all other days in January.

is this normal or hv I made any mistakes?

anyone can share their experience? thank you for your time.