MTS / Sistema Shyam TeleServices [SSTL] — Mblaze data card validity expires before the given date

Address:

Kolkata, West Bengal, 7000091

I am using mblaze modem with data card number ([protected]). They gave me offer that if i recharge within the expiry date my balance would be carry forwarded. The expiry date of my balance was showing august 5th 2016. When i opened my laptop to recharge on the same day it was showing the balance is zero. I had around 6 gb of data. When i called up customer service they said that the balance expired on 4th of august. When i asked them if balance expired on 4th why was it showing 5th, they said 5th august means till 4th august 11.59 pm. This is really ridiculous. How can 5th august mean till 4th august 11.59 pm. Then they tell me to write email to [protected]@mtsindiaindia.in with the same issue. Initially they said that within 48 hours i will get a resolution. Then when i get back to them after 48 hours they say to wait for 24 more hours.. And now it has been more than 168 hours.. And they stopped replying.