MTS / Sistema Shyam TeleServices [SSTL] — Feeling be fraud by mts. I am not getting internet speed which they told me after buying dongle (Item).

Address:

Morbi, Gujarat, 363641

Sir,
I am not getting internet speed that MTS Company Admitted me to give before I buy that dongle. I Complained too much at customer care executives. But the response or Revert Result is Negative. They Behave negatively with me. They do not agree to give me that internet speed as I get before.
Now a Days, this problem occurs till last 2 months. I am not getting result which i want. I Registered too many complaints At customer care and also i talked with some persons which are related to this company like ASM, ZSM and Local Engineers, but now a days i feel like i m being fraud. I am getting tired to taking so many followups and i feel totally loss with my money, time, mind and energy.
So please i request you to please give justice to me that which make me feel happy or satisfied.
Please Do as soon as possible