Airtel — violation of do not disturb policies against my number

Despite subscribing to dnd option on my post paid number, i have been getting telemarketing calls on my phone number. Also, i am flooded with spam text messages. I have called airtel customer care and also sent emails to them to this effect. The company is so brazen that they have not acknowledged my complaint yet. This is a clear violation of trai policies on customer privacy. My post paid number is [protected]. Please advise next steps to resolve this for me.