Unprofessional & disrespectful communications with INZ / adviser’s communications criticised INZ staff for being incompetent & threatened to raise complaint with government agency / INZ staff felt belittled, stressed, incompetent, upset & bullied by communications / adviser copied communications to lawyer & another adviser / INZ’s character concerns not brought to client’s attention / Immigration Advisers Licensing Act 2007, s442 / Code of Conduct 2014, cl1, cl2e, cl4a / adviser’s criticisms unprofessional & crossed disciplinary threshold / tone & text went beyond robust advocacy & amounted to unjustified personal attacks / communications not at upper end of being unprofessional / criticisms & threats unjustified but not offensive or intimidating in unlawful sense / adviser honestly believed clients wronged / adviser withheld information & failed to obtain client’s informed instructions / adviser breached client confidentiality / complaint upheld.