Airtel – 4G Signal Not Received

I hav changed my simcard from 3g to 4g by taking a new one.It has been 15 days since i hav taken a new sim of 4g.Bt still thers a H+ sign only that is been generated and signal is also coming of H+ only.And LTE signal is not being displayed. I hav tried calling on 121 a many times bt i hav not received any proper attention and answer regarding my calling them many times and complaining a many times.They are responding us to call at airtel gallery.I hav tried calling at gallery also bt still there is no response of them towards us. The customer care people are telling me to go to airtel gallery and airtel gallery people are telling me to go to customer care and talk to them.Then now wat should i do exactly?? After that i mailed to total of 3 nos that is basically 121 + Nodal Officerand + appelate.west; but still wat i hav got by talking to them is just courage and console. After that i received a call from appellate.west and nodal officer after some time that we hav registered your complaint.We will solve your problem in 24 hours and will come back to you again. As soon as the call ended i received 3 sms that your problem has been solved. This is truely your good and awesome way to fool a customer! Isn’t it? I hav checked trying that sim in 4 mobiles bt its not working in any of the one. Which is:- 1 – Samsung Galaxy A5 2 – Apple Iphone 5c 3 – Lenovo Vibe X2 4 – Huwaei Honor 4X And if you want to check it in any of the model then please let us know that specific model no.Bt if you think this then i am sure that you may be also thinking that you can easily fool mumbaikar’s is your misconception. Written; By your sad, innocent and conscious customer . Mr. Manish.M.Shah 9819755800