Wipro Tableau Developer interview questions

Interview was of 4 rounds including Technical , Managerial, Client and HR discussion. But Even after Selection,They haven't released the offer .They are frauds . My salary expectations was as per their budget as well , still such a reputed company does this . I will suggest not to waste your time with them as they have started the BGV as well without giving the offer . At start they will convince you that they will release the offer within 2-3 days . But when the day will come ,they will keep you hanging by saying ,it's a technical issue and so on .