Trai — i had order mi 6a mobile but he cancelled by him and they can't refund my money 5999

Address:

AT-devli,POST-Kharpale,TAL-PEN,DIST-RAIGAD,402107, Raigad, Maharashtra, 402107

I had order redmi 6a on sat, 02-mar-2019 06:26 pm there no cod so i order prepaid billing. But they cancelled that order next day without any reason so i also apply for refund amount. But there was no response from there side. Up to 2 days, then i contact with there chat support team on 11.03.2019
They register complaint against (Woin[protected] and he told they call back in 4 hours about that but till time they cant contact with me. And today i repeat contact with there chat support team mr. Rahath anjum i asked about (Woin[protected] status. Thaey wasnt give me status and yesterday why not calling me from your side, then they lied he told we called but you are not reachable. But i told him my mobile had reachable. He told we give you proof about calling, so i told please give calling details. Then he told i was not share to you. And they told me we rearrange call back to you in 48 hours. I told him its my urgent basis i need my money as early possible, but they wasn't help me on that. They show only purchase refunded.
Sir/mam,
Please help me to refund my amount.