Tata Docomo — not working

Address:

Bangalore, Karnataka

i had purchased tatadocomo3g dongal internet services on 1st of december 2010. every day after 6pm it does not connect at all. i called the customer care several times. initially they tried to solve the problem by phone it self, when the problem was not solved they agreed to send a technitian and get it rectified. one day technitian had called up for appointment and i told him to visit me after 7pm any time at the mentioned address, but he replied that his afiice hours end at 6pm and so he cannot come. when i called the customer care again to send another technitian they say that the network is not available in my area and i need to start using it some other place or shift my entire office to a different place. please take this matter seriously and get me the refund of my entire amount.
thanking you
regards
krishna kishore sannidhi
no.[protected]
amount paid : 2500 for dongal and 2500 for the instrument