Airtel — 4g is completely used, 2g is not given even though the plan tells i should get 2g till rest of the month

Address: Bangalore, Karnataka

I had got a new airtel 4g dongle on 16th of august and it was activated on 18th. I got a 4g postpaid plan of 999 rs which tells i am supposed to get 4g speed till usage of 10 gb and from thereon till end of the month i will get 2g speed. i just used for 2 days and did not watch lot of videos, just surfing Facebook, Gmail and some education stuffs and i got message that my 100% usage is complete . But then when i tried to browse websites, i coudn't and i was taken to airtel129 store site(http://one.airtel.in/as/otp/details.html?rd=http%3A%2F%2Fone.airtel.in%2Fup...⇄ asked me to enter my dongle number and then there was a confirm button so i entered my number and then tried to click on confirm button which was not responding at all.i tried contacting customer care but those people told me that 2g speed is given but it wasnt enough for loading website. I tried inserting that sim to my mobile and then when i went to airtel 129 store website it responded there and i was able to use for 1 day . Then they got to know about that and again stopped me from using it. They are trying to cheat the customers. please take action against airtel 4g asap.
Thankyou
Vignesh