Reliance Jio Infocomm — My deposit amount is with them. They are not returning it

Website:

Jio fiber

I have placed a request for disconnection of their Jio fiber connection and wanted them to pickup their router and refund the deposit amount that I have been charged at the time of taking the connection. It has been 4 months since the day I have placed the request. None of their executives turn up to come and collect their router. Everytime i call the customer care, they tell sorry and that they have escalated the matter. But all I get is an sms saying that their service engineer will come on some date. But that particular person never comes. At the end of the day i receive another sms saying that it has been rescheduled to some other date. This has been going on from more than 4 months. Their router is still with me and my deposit amount is locked up with them still. My jio fiber ID is[protected]. My account number is:[protected]. The complaint unmber is: CO00009WOAB2. I am attaching the screenshots of some of the sms that they have sent me. Kindly help me and see that my amount is refunded.