Reliance Net Connect — Creating unnecessary trouble

I had used reliance internet connection last year. This discontinued during june last year as people from thier side had come and cut the wires without informing the customer/user. On asking the reason executives replied very casually saying that they had to put a new wire . We were not very clear with their answers.. evrytime we had called they were unsure of what to answer. Then we stooped using net connection. After two months they call up again demanding to pay bill.. All bills had been payed. We asked them to check once as we did not recieve any bill either online or mailed to address. None was recieved. It was clear something was wrong. After almost an year I am surprised to see a message recieved from their end demanding to pay amount 4685 for landline connection #. We had never used any landline connection. This is ridiculous. They sue the customer saying pay to avoid legal action. This is very wrong. Please consider this serious issue.