Avengers star attracts wrath of activists after appearing in ad for company with West Bank settlement factory• Oxfam under pressure to cut ties with Scarlett Johansson over SodaStream adScarlett Johansson has quit her ambassador role with Oxfam following criticism over her decision to star in an advertising campaign for SodaStream, the fizzy drinks company which owns a factory in an Israeli settlement in the West Bank.In a statement, Johansson said she was ending her relationship with the humanitarian group over "a fundamental difference of opinion".