Can you tell me how could someone kick an opiate addiction?

Various ways: Short-term detox with methadone, Buprenorphine or Clonidine can be effective, especially when combined with an intensive treatment program, but the relapse rates are high. There are "blocking" agents like naltrexone, also available as a long-acting injection (vivitrol), which protects the person from "getting high" on opioids. Maintenance therapies with methadone/buprenorphine have best results.