Here is the update to my plan
I got the 100mbps upgrade and it is amazing
SNR dropped to around 8db but its still stable, no disconnection issue
Right now I have applied for Smart TV since it is included in the whole package of 100mbps, the DSL guy of our exchange was nice enough to install and configure everything quickly but I think it is using the internet to stream Smart TV because whenever I start downloading something, Smart TV starts getting stuck. The higher download speed I get, the worse Smart TV gets, like if I start downloading at 10-11MB/sec Smart TV is barely watchable.
Its been 8 days and whenever I call the complaint/helpline they say "Sir aap ka to Smart TV active hi nahi hua jab tak active nahi ho ga tab tak aap ko issues atay rahein ge, mein idhar se complain forward kar raha hon 48 hours mein issue resolve ho jaye ga"
Pata nahi wo 48 ghante kab hon ge