[Resolved]  Reliance Jio Infocomm — unable to get 4g speed in my plan

I recharged rs.399 plan on my jio number. I am facing so many problems after i recharged.
Jio did not provided me fast 4g internet speed, it provided like 2g speed.
But when i get good speed then after some time like 10 15 minuets it's again work as 2g internet.
Jio cheat me because they don't give me 4g speed when i have 4g plan of rs.399.
Why they provide me 4g speed for a few moments when i m in a 4g plan.
Please report to jio for providing me a high speed 4g internet according my plan.