Idea Cellular — issue of 4g network and text messages

Address:

Agra

Sir/madam,
I have a issue of 4g network since 45 days and i complaint many times but no response. They changed my sim as they was telling me that my old sim was 3g but that was 4g sim and charged 50 rupees + 18% gst.. I visit many times at vi store was no response and they gave me contact number for contacting but now they are not receiving my call and put my number in blacklist. Today also i complaint about my 4g network on 198 customer care service, however they told me to exchange the sim but how many times i have to visit vi store as i am doing service and i dont have a time to go again and again. Now new issue came from since 7 days that text messages are not sending from my vi number. Please solve my problem. I am a postpaid customer.
Thanx