Excitel — without completing 30 days duration they are asking me to pay money

Address:	500018
Website:	www.excitel.com

Internet is not working from the past 3-4 days.. Works for a couple of hours and then it goes down.. Raised more than 7 service tickets/complaints.. Spoke to reps.. They just give excuses we are working on it... They do not even give compensation as i already paid for their service!!! Again they are asking me to pay next month with out completing 30days,
Remaining 15 days are there, which are to be used...
Kindly help me