Excitel — Security Refund not Processed

After collecting ONU device they asked me to wait for 90 days that from
aug 15 2022 as per their policy rules so I followed that, then again due to some error they asked to wait for 10 days more that is till 25 nov 2022, even they took my account details to process refund. Now it's more than 100 days I have not been refunded till now, and still they are just expecting me to wait.