Cognizant Technology Solutions — delay in getting offer letter

Address: Ernakulam, Kerala

I'm kim mathews, i had attended interview with cognizant at kochi office on 8th dec 2018 for oracle pl sql. I completed all rounds including hr and i was told i would get call within 2 weeks regarding offer letter and joining process. And till now not got any communication regarding the same.
Even last month i got mail for another mail for interview with cognizant and it said candidates under selection process need not apply.
So i replied asking the status of previous interview as i've not got any communication regarding the same. To which hr person looped in some one else to my mail to check on my request. Now it has again been 1 month and i've been trying to mail this person and no revert on status.

Please help in resolving this concern.