[Recommendation] Toyota Fortuner replacement head unit experts

I'm in BKK for the week and am looking for a recommendation for after-market car head unit fitters.

I had a Stapon Head unit fitted in my Fortuner recently - one of these:

https://www.lazada.co.th/products/stapon-9inch-25d-ips-for-toyota-fortuner-2011-2015-android-81-2gb-ram-car-stereo-navigation-head-unit-plug-and-play-multimedia-player-with-wifi-bluetooth-gps-steering-wheel-control-rear-view-i330704949-s635164201.html

Unfortunately, my local car hifi shop guys were unable to get the steering wheel controls working. Everything else is working fine.

Can anyone recommend someone in BKK who might be able to get the steering wheel controls working properly?

Cheers in advance,

 Dave