Mts — Mts dongle not activated after 6 days

Address:

Kolkata, West Bengal

Dear Sir,
My name is Surjadip Roy, I am from Kolkata. On last Friday (27.06.2014) I have purchased a MTS 3G+ dongle by exchanging with my previous Airtel 4g dongle & cash amount of Rs. 1099.
At the time of purchasing the MTS dongle I have submitted the following documents--
1. Office address proof, given by our HR dept.
2. PAN card Xerox
3. Voter card Xerox
4. Passport size photo
5. My official identity card Xerox
I have requested the lady (Ms. Anita, Mb no [protected], who gave me the call to purchase the MTS dongle) to activate my MTS dongle as early as possible. She confirmed me that by 30th of June'14, my dongle will activate.
Last Monday (30.06.02014) I called the lady (Ms. Anita, Mb no [protected], who gave me the call to purchase the MTS dongle) to know the status of activation, she told me that one person will visit my office to verify my address.
At 4.00pm (on 30.06.2014) I got a call from [protected], that person told me that he is coming to my office for address verification. But, he did not came for verification.
On (01.07.2014) when I called that mobile no ([protected]), the mobile was switched off. When I was trying to talk with the lady (Ms. Anita, Mb no [protected], who gave me the call to purchase the MTS dongle), her mobile was not reachable. When I was trying to talk with the shop (Mb no [protected]) from where the sales boy came, that mobile no was also not reachable.
The owner of the shop (Think Tomorrow) is Ms. Madhumita (Mb no. [protected]), she is not receiving my phone.
Please activate my dongle as early as possible, its my request to you. I am attaching herewith the invoice copy for my dongle, please go through the attachment.

Thanks & Regards,
Surjadip Roy
Mb No. [protected]