Bad Broadband. Review on Airtel Broadband

I have Been used Airtel Broadband From Past 1-2 Years.I Buyed It Just Because I thought its an Airtel Broadband How can I Even Think Twice? Airtel is not a New Company So I Trust it as well Like Mostly 60-70% Peoples Do .I Have to Do Some Work and it wont Be Possible Without High Speed Internet So I Thought To Buy Airtel Broadband because that time Its Givinh Good Net Plans With High Speed Mbps Speed in a Affordable Price. I decided to Take a Plan Below 1000 so I Get an Offer Where I m Getting 30 Gb and after that its Gonna Be work in Unlimited.I Used Airtel Its Gives Good Speed Comparison to other thats why I Bought That Broadband.After usage of 30Gb/5mbps Theh Promised me ill get 1-2 mbps Speed But I just get 500-700kbs I never Get Increase Os this.Rhe Promises Airtel broadband Gives Me they didnt Full it And after sometime I changed My Broadband to the Other Broadband.The Customer service is too Cheap & low They said Sir Its just you Used all of your data Now its Running free so we wont promise that you will definately get 1-2mbps and I was like If u told me before I didnt even Gonna Purchase it.