I had previously written an article about the most popular cameras’ brand Service Centers such as Canon, Nikon, Sony and Panasonic to which you can refer here.
When it comes to find a multi-brand service center, it is always a little bit tricky to find good technicians.
Hopefully, I have found AV Camera ! They have their own workshop and technicians and they speak english very well !
AV Camera is a real photography shop, they don’t only sell gears, they also give good advices and customer service.
AV shop is located nearby Saphan Taksin BTS.
AV Camera’s Facebook Page