high speed plan but slow internet

Messages
91
Location
india
ISP
bsnl
i have 200mbps plan of airtel fibre and ont is directly connected to pc with cable . Now it has been 2 days it feels speed is not even 20mbps , 4k video on youtube struggles to buffer. what should i do? I do not know how but speedtest.net always says speed is precise
 
Call CC and tell them the engineer will figure it out if you don't want to swing your head around.
Because it's their job to provide at least 80% of the claimed bandwidth.
 
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