1) if your wife is not willing to divorce you by mutual consent you have to file contested divorce petition on grounds of mental cruelty / adultery
2) please note that contested divorce petition take over 5 years to be disposed of
3) mutual consent divorce petition take around 6 months
4) you cannot hack into wife internet account . it is breach of her privacy
5) it is difficult to prove adultery .
6) the contents of chat conversations exchanged by your wife with other men have to be gone into .
7) mere chat conversations would not be enough to prove adultery .