Hathway — Hathway Cable Internet - Chennai Non-Refund of Modem Deposit

Dear Sir/Madam,
Costomer ID: [protected]
I have subscribed to their cable internet in Jan 13 and paid the monthly usage charges in adavnce in Jan-13 along with refundable security modem deposit of Rs 400 ( thier receipt no. R[protected] dated 13 Jan 2021). I was moved out of Chennai to remote location and returned their modem on Aug-18 and reqested several times for refund of security deposit. No Action was taken for the last months