Siti Broadband — Broadband service/ not providing what i paid for

Address:	New Delhi, Delhi, 110095
Website:	www.siticable.com/ServicesBroadband.aspx

I made a payment of - INR 1709 (this includes the balance of Rs. 228 from the previous plan) on 12th October 2015 for a plan change for 100 Mb/s.
As i did not receive the desired speed and instead the speed was around 12- 13 Mb/s i gave a call to the customer service on 15th October when the ticket number - [protected] was created. I got a call from the network team the same day and was informed that my modem needs to be changed and would be done within the next 2-3 days.
The next day i received the message that the ticket - [protected] was closed and hence I called the network guy and was informed that the modem change would require at least a month or minimum 20 days.

So once that is confirmed, there was no logic in continuing this plan as my usage of 50 GB would be completed in a speed of 2- 3 Mb/s wherein I have paid for a very high speed.
Now when I am trying to change my plan to a lower speed, it is still asking for money.
I called the customer service on 17th and was informed that I need to send my concern on email. I have sent all these on email as well as requested by the customer Service Guy on 17th October. No response received.

I called the Customer Service on 21st October and the guy assured me that my previous email has been sent to the network team and he has raised another ticket - [protected] for getting my issue resolved for Speed which had decreased to only 2.50 Mb/s.
I checked the ticket today on 31st and found that the incident was closed after I disconnected the phone on 21st, not sure what happened to the customer services guy.
I called in today again to get an update... Naresh picked up the phone and did not know my issue by the previous tickets.
I repeated my concern again and he assured me that he is raising a request for the modem upgrade again, which sounded awkward to me that for these many days no one in SITI even bothered to raise a request for.
My total usage till now is 21 GB in a speed of 2-3 Mb/s. So I am left with another 29 GB. Till the time I would receive the modem, I am sure I would complete another 10 GB (Go through my usage history), which means I would be left with 19-20 GB of data in 100 Mb/s connection. So basically I paid a total amount of Rs.1709 for a speed of 100 Mb/s - 50 GB connection and I got - 2-3 Mb/s 30 GB connection and 100 Mb/s 20 GB Connection.
This shows that they are overcharging me and not providing what I requested for.
Naresh also confirmed that the best he could do is give me the modem as soon as possible and nothing else.