Idea Cellular — Bad internet speed

I am filing the complaint second time. First time customer care guy suggest me to change the SIM card to get the better speed. I did that as well still no improvement in data speed. I would say it is India's slowest internet. I request to resolve my issue as soon as possible because my work is badly hampered by this issue. If you don't resolve the issue please revert back my remaining recharge amount. I would like to switch to other network. I have attached screenshot for reference. You can check there is 4G network but data speed is 1.xKbps.