Vodafone — Internet speed slow issue from 1 year

My name is Nirmalya Debnath. I am using A Vodafone Postpaid 4G sim card. I want to inform you that again I am facing Slow Internet Speed from 01/05/2023. I did not any work for this problem. And also I am facing another issue that is when I'm calling with any mobile number then Data does not work. Then only shows the G sign. I have multiple complaints of Vodafone Appellate Authority by the letter and by email. They also visited my location but they did not solve my this problem. So I request you please check and solve the problem again.

I hope that you will look carefully at my written statement and take an initiative in this regard.
Thanks & Regards
Nirmalya Debnath