Bharat Sanchar Nigam [BSNL] — BSNL tower rent pending from sept 2020

Not receiving the rent of BSNL tower which is installed on my building at Ayathil, Kollam (Near meditrina hospital) from sept 2020. self is calling the kollam BSNL office section from last jan 2021. no positive actions taken. in the month of feb 2021, self visited the office and met AGM and told my financial issues and he told will clear in the first week of march 2021. But no funds has received to my account. while calling nobody is picking up the call as caller id is identified. self called from other numbers which is not provided to them, then they attend the calls as its from unknown number and treating us like beggars, while asking my pending rents.