Airtel — [protected] continuous decrease 4g speed at night

Address:

Same, Howrah, West Bengal, 711303

Dear sir,
Still my matter is not solved by airtel regarding my 4g slow speed encounter every night. My no., [protected] didn't get faster 4g net, instead the company only provides 2 or 3 days fast speed when complained here.
It seemed it's their practise.
Even worse, i am moving from airtel patna server to airtel kolkata server with the same slower speed.
Some local informed me that they are providing service by making coverage their tower direction towards us for 2 to 3 days then moved the location of their tower to other direction, resulting in my same situation
Sir plse intervene into this situation and resolve it