@morecrap According to @Crazy_Eddy the Binatone modem uses the same Realtek platform as beetel. So, there is no permanent fix for these modems I guess. Contact 121 and ask them to get your replaced with a Huawei as soon as possible or just buy a VDSL modem online and return this modem to airtel. I'm pretty sure they will take it back since it has no fixes and won't charge you for it.
I'm using a beetel modem currently.. I have the same issue as you. They're gonna get my beetel modem replaced with a Huawei modem this week.