Teamlease Services Pvt Ltd — Have to correct My date of joining in Teamlease services

My Name is S.Anandakumar and my Employee code with Teamlease services was 1401455.I joined Teamlease services on 11/06/2018.My Last working with my previous employer was 10/06/2018.But in my Offer letter from Teamlease the date of joining was wrongly Mentioned as 06/06/2018.Though I have sent proofs regarding this to Teamlease services via Mail to both [protected]@teamlease.com and [protected]@ teamlease.com they continuously refusing to correct My date of joining as 11/06/2018 instead of 06/06/2018.Please correct My date of joining in Teamlease services as 11/06/2018 instead of 06/06/2018.