Termination of SMS promo offer without intimation.

Location/place: Kolkata

Name of company/service: Tata Docomo GSM Prepay

I recharged my Tata Docomo prepay number 9038744622 on 24/05/13 with a Rs. 25 voucher. I got informed about the offer by an SMS sent from Tata Docomo. I checked the website too and verified the offer. The voucher enabled 110% talktime benefits on recharge of Rs. 100 and above for 90 days. There was no conditions mentioned in the SMS nor on the website.
My number came with a pre-activated SMS offer. The first two SMSes for the day was charged and then the next 98 SMSes would be free of cost. In a way, in a month if I activated the offer everyday it would give me 3000 SMSes for Rs. 36(Rs. 0.60 X 2 X 30= 36).
On recharging with Rs. 25, my first two SMS chargeable-next 98 free for the day offer was withdrawn without any notice..not intimated before and not even after I recharged.
What is this?? Is this transparency when an offer is being communicated to a customer??? What has a top-up voucher recharge got to do with an SMS offer?? The complaint registration page on the company website does not work. I don’t understand why TRAI does not slap charges and bring the company to book.
Nowhere was it mentioned that recharging with the Rs. 25 voucher would terminate my pre-activated SMS promo offer. This company is just useless.
Half of the recharge vouchers has a tail of conditions attached to it but nowhere is it mentioned. Only when one recharges does one get to know about the tricks of the company. Cheating people is the only aim of the company.
I immediately want my SMS promo offer back. I don’t want to hear stupid excuses. Terminate my Rs. 25 voucher but I want my SMS promo back on my number.