did you tried contacting customer care ?
well in my area too their service used to be really good, i have been using their connection from i guess more than a year now and it was really good ( except from their usual packet loss ) but from past one month i am having all sorts of trouble with them like connectivity issue, slow upload speed, frequent disconnection. if its a connectivity issue they usually fix it in less than 4-5 hours but if its a frequent disconnection or speed issue then they sure take their own sweet time to fix it, usually around 24- 48 hours.if your lco is not interested in getting this fixed permanently, start looking for a different service provider.
excitel in my area is working great in my side of the sector. but my friends living on the other side are facing massive problem and are now moving out.