Consumer Redressal

I was using TIKONA internet and it was not working properly so I have complaint many times but they was unable to fix it. One day I called to customer care regarding not working of internet properly and they were not ready to listen so I asked them to disconnect my connection , that customer executive told it will be disconnected in two days. So I have taken new connetion, After two months I got call from \"tikona\" stating that you have two months due amount I told i didnt use, they told its unlimited plan so you need to pay. Then I called to bangalore regional head of tikona , He told you dont have to pay. Now they are harassing me by calling and giving threat for imprisonment, To get reid off that I m ready to pay bill also but they are not telling fixed amount, in one email they told 3500, second say 2378 n now they 1078 and today again they say 2378. Could please help me to get solve this issue. Thanks a lot