WUR request and no response

I have purchased my laptop dell inspiron3511 on 16 October 2021 but after 1 month and 13 days of uses its hinge got broken,i.e, on 29 Nov 2021.I raised a complaint on 29 nov 2021 regarding this.they told that a memo has been raised on this model,although it was a newly launched model. After that they have raised my complaint for parts replacement which was going to delivers on 26 January 2021..But after 3 days they mailed me that some parts are in backlog.So if you are ready for whole unit replacement then kindly mail us you invoice.after mailing invoice I haven't received any mails yet.on contacting technical team they keep on saying that our senior team will mail you.you have to wait.today is 17 January but till now i haven't received any mail..its a brand new laptop and i am facing this problem.pathetic service.mentally broken.I have invested heavy amount in this and they are doing like this.