[Resolved]  Mts — expired data validity within 2 week

Address:

Uttarakhand

I bought MTS mblaze (RS 1500) data card on 04 march 2012 from computer world raj plaza dehradun.they told me that i will get 3 gb of data for one month but after few days i notice that my data validity is expiring within 2 week i.e on 18 march.
I called to seller he gave me a no. of MTS office in dehradun.when i called to office they told me that your card is activated on 18 feb due to some kind mistake in update of date.
what should i do now..because i wasted 1500 rs to get data for one month but my validity expired on 18 march.i want extend my validity for complete one month with remaining data.
My mts data card no. is [protected]