Intermedia Cable Communication Pvt Ltd — Refund of security deposit

Address:

ICC CABLE PVT LTD Parmar nagar, Fatima Nagar, Pune

I was a cutomer of icc cable, fatima nagar, pune branch. I submitted back the set top box on 13th sep 2021 and cleared all the dues. Icc cable is supposed to refund me my security deposit of 1000 rs but they have not done it.
I have been calling them since then and atleast 30 time i spoke over phone but nobody is entertaining.
Please give me my security money back