Cognizant — onboarding issue

Address: Rangareddy, Andhra Pradesh, 500070

Hi team,

My doj is dec 2018, all pre joining formalities are done but my bgv is in progress still. Suddenly i am unable to login to onboarding portal. I asked h. R about it. H. R said that they are recreating the offer again. If recreated the offer, again do we need to do all formalities again?
H. R said my previous cmny is in blacklisted and let bgv complete then resign from current company. But i havr all documents with me form16 also.