Tata Teleservices — Tata broadband

I have been sending emails and calling tata coustomer service from March 2020 to lower my internet plan from 825 Rupees to 371 Rupees per month. Tata tele broad band has not replied and i am still paying 825 Rupees per month. I would like refund for the extra payments i have made of 4086 Rupees and change my plan to 371 rupees per month. my account number is[protected]

Thank you.
Tejal shah