Most people that get the free 2 years D+ Hotstar subscription will be expiring in around next 6 months.
If i remember correctly, Mine would be expires in May this year.
(But i dont really use it,since it didn't have enough movies or drama compare to Disney+(With SG VPN) )

been experiencing slow connection with cable for the past 2 days
after calling to unifi to reset the port, still same speed

What else can I do? How long do I need to wait out before TM will 'layan' another reset?

800Mbps become 80Mbps only