Spectranet — Internet not working from last 11 days

Address:	Pune, Maharashtra, 411057
Website:	Spectranet.in

My internet is not working for last 11 days from 7 aug 2016.
I have already called the customer care multiple times.
From last 2 3 days, they say - it will be fixed by today but not fixed.
On 16 aug - 2016 someone from their techincal team visited my place, went to terrace and just left without informing and without fixing the issue.

I am feeling chetaed as they take 90 days money in advance and not providing service for 11 days.
My account registered number is [protected]

My net is still not working and there is no help. What should i do?