Croma — Refusal of sales at you store at vivira mall navalur

I visited your store on the 3rd of Nov at vivira mall in navallur chennai, i chose an Iron box manufactured by Philips. The store assistant manager Mr Praveen refused to sell the said iron box because I did not provide a mobile number . Is it croma policy not to sell products if the customer does not provide mobile numbers ( due to person reasons) ? . If so why was it not mentioned at the point of entry. Is it a mandate by the government? Expecting a reply for the same