[Resolved]  Club Mahindra Holidays — Unsolicited promotion calls irrespective of request for DND

Irrespective o[censored]mpteen number of requests of not wanting to be contacted unsolicited calls at very odd timings keep coming in.
Club Mahindra has a funny policy of not offering packages for unmarried persons - and in case some one wants to buy one, they have to buy it through a married couple of their family. I don't want to buy any holiday services through any family member and hence I have strictly instructed Club Mahindra tele-callers to not call me. One of them even confirmed that a request has been taken online and been confirmed. But I still receive calls and the tele-callers keep selling me packages at odd timings.
I tried hunting for DND registration on their website, but could not locate it easily. All tele-callers claim that they are not aware of any DND application facility through website. Please help resolve!