Airtel — poor internet services for 448/- pack

I'm a long customer of airtel, from past 3 months i'm not getting a proper signal at all for using the internet. I thought to switch to another service because of it's poor service but when the pack is about to expire in 3 days again it worked very well so i've renewed the pack with 448/-. Again i'm facing the same issue. Kindly resolve the issue asap, getting frustrated with the worst service from such renowned network.