You want 3 different controllers then. If that company doeant get back to you then just buy 3 of the same kind of controller individually.

Something like this: SUPERNIGHT WiFi Wireless LED Smart Controller Working with Android and iOS System Mobile Phone Free App for 16.4ft 300 LEDs RGB LED Light Strips Compatible with Alexa Google Home https://www.amazon.com/dp/B01JS0KEBW/ref=cm_sw_r_cp_apa_i_BYSyEb904PGW8