Advising people to refrain from committing haraam

Q: Am I sinful if I see a family or friend saying or doing something haraam and I don't denounce it. Ever since I found this out, I have been telling people so politely but now I keep spotting things and because I keep denouncing things, I lost so many friends in the past as they find me annoying and it makes my life miserable. Is denouncing a sin in my heart efficient or am I sinful if I don't say anything?

Benefits from a bank

Q: Is it haraam or sood/interest to receive free Telenor minutes and MBs by keeping more than one thousand rupees in Telenor Easypisa account and doing at least one transaction from the Easypisa app account in a month? Telenor gives 50 net minutes and internet MBs to such customers. 

Reconciling after khula'

Q: I divorced my wife once but I took her back into my marriage. Thereafter she became pregnant. Then she asked me for a separation (khula'). After giving her khula', now we would like to get married again knowing that she is 6 months pregnant. What is the procedure to follow?