Bharat Sanchar Nigam [BSNL] — low broadband speed

Address:

Jalpaiguri, West Bengal, 736121

I am using broadband combo plan 249 from bsnl which was revised to become broadband combo plan 299 excluding gst which offers upto 1.5gb data daily upto 8 mbps speed and after that unlimited with 1mbps speed. But from last week i have only recieved speeds below 1 mbps. I complained two times to bsnl customer grievance cell, once using the official complaint portal and next time using the customer care number[protected]. The concerned authorities have not yet responded.
My docket no using the customer grievance portal is wbl/co/2019/3067
My docket no using the customer care telephone no is [protected].