Bharat Sanchar Nigam [BSNL] — Internet speed is too low 4g

Initially, I got a moderate speed of downloading speed (2 Mbps in peak time. Also noted 7 Mbps in low traffic say 12 AM - 8 AM). But now (From Oct 3rd night 2020) speed has been reduced to 1 Mbps irrespective of peak time.
Also observed that this issue is in my locality (Locality Pin code: 680683). When I moved to a different tower location, I got enough speed.
I've reported the same with my nearest BSNL office. But they haven't taken into consideration yet.
Please fix this issue as soon as possible since this is effecting my job.