Reliance Jio Infocomm — data getting exhausted very quickly

Address:

5,Ultadanga Road, Kolkata, West Bengal, 700004

I could not be able to use my internet as i used to do it in the past a month ago a problem started with my jio fi even if i am doing simple browsing it is showing 50%data exhausted it's frustrating my important works are getting delayed and i also feel like getting cheated paying money but getting satisfactory service please look upon the problem or should i switch on to other service providers.