1 - NO, it is NOT the IT Square Laksi Plaza location 😮
If you have a real 60 day tourist visa entry stamp you go to the main immigration office out at the government complex (Building B) on Chaengwattana Road and you want Counter J,
You shouldn't have any issue walking up and applying (it won't be that busy if you don't go on a monday or a friday)
OR
You can make an appointment online at this website
********************************************
*****
There are copy/photo shops in the basement of that building
****************************