BSNL — broadband internet too slow

Address:

Rupnagar, Punjab, 140108

My bsnl phone no is 279201 and i have broadband plan of 845 in which i get upto 4 mbps speed upto 20gb but from first date till today i hace not received 2.50 mbps speed and in day it gets even worse.i am getting 10 to 30 kbps speed regularly in day and on night it hardly reaches 2.40mbps.From 8 months i am regularly visiting bsnl office but my complaint is not solved till now .Yesterday even bsnl officer told me that i should disconnect my connection if my complaint is not solved.