The operator of KLT, Media Plus (HK) Ltd has informed Astro that it will no longer continue the operations of the channel.
Kah Lai Toi channel has ceased transmission on Astro starting 30 Sept 2017 at 11.59pm. So far, Astro did not announce any channel replacement.
Kah Lai Toi's official Facebook page did made an official announcement regarding the channel cessation.
As you can see the reply by Astro, it seems that the channel itself decides to pull off the channel from Astro, not the other way round.
NOTE: Effective 1 Oct 2018, the "Subscribe/Upgrade Astro services" form are no longer accepting further submissions.