GTPL Broadband — Internet disconnection

Address:

Ahmedabad, Gujarat

I have GTPL Broadband connection at my home. I have paid 3 year advance for the same. My internet connection is not working since last 15-20 days. Daily I call them to solve the same but still it is not solved the only answer is your query is in process, when I ask them to give me number of technician they dont provide the same, also when I ask them to transfer line to some senior they dont transfer the line too. I think GTPL has hired telecaller team to make people fool they dont have any technician to solve the problem. They have taken advance money now I cant do anything please suggest me to tackle the problem.