[Resolved]  Idea Cellular — Getting 2G internet speed 1 kbps instead of 20 kbps as promised

I'm using Idea's 198rs unlimited 2g data pack with validity of 30 days, post 1.25gb usage the speed will be reduced to 20kbps. I used this pack for 6 months and the speed was never an issue. But from this month after 1.25gb usage, my speed is substantially reduced to 1kbps. So i contacted the customer service executives 3 times and done whatever they asked me to do like setting configuration, manual network selection, clearing caches, putting my sim into another phone etc. But none of them worked. My friend also have a Idea sim and uses same data pack as I do, but he doesn't have any problem with speed. I'm posting this complaint here thinking that may be the issue can be solved by any of you. Please help me.