broadband conection(airtel)

Dear Sir

on 5 august2009 Mr.Ashish called me for AIRTEL Broadband connection from Lucknow.He sent Mr Naveen to my residence same day i was giving cheque amount of 750.He told me your connection is installed within three day.On 9th augustI Called mr.Ashish and he told me your conection can't be install due to some technical reason then i told him no problem kindly return my cheque but I'm sorry to say that i'm not receiving the cheque still today.Mr.Ashish not recieved my phone from tht day.I'm suffering from mental Hrashment.yesterday(19th august) he recieved my phone and told me kind stop your payment.i'cant give your cheque.In future I can't deal with Airtel fo any sevices and I hope I will not advise any one.so kindly try to solve my problem.Details are as follows:
Name:Atul Ranjan
Mobile Number:9838200195
Location Lucknow
Airtel RM name:Ashish
Ashish Mobile No.:-09651684895
Cheque No:-371494
date:-05/08/2009
Bank :Punjab National Bank
Thanking you
Regard
Atul Ranjan
2/511
Vijay Khand
Gomti Nagar
Lucknow
Pin:-226010