Airtel — internet problem bad

Hi
Am vijay from chennai my number is [protected] i am using 364 plan and the internet is very bad and slow and i asked to the nearest airtel showroom they say it will get faster automatically but it did not get any faster its same slow i[censored] won't take any action then please close my sim just deactivate it or else tell me how to change the same number to other network, i[censored] don't speed up my internet i will surely change network and i will post the same complaint on facebook.
Thank you