Amazon UK profited £20 billion during the coronavirus pandemic, however agency workers have said the rise in sales was "on the back of slave labour." Sales rose by 51% as the country went into on and off lockdowns but workers were reportedly struggling on zero hour contracts.In an investigation carried out by The Mirror with the Bureau of Investigative Journalism and ITV News, it has been discovered workers were also faced with unpaid wages and shifts dropped at the last minute.The investigation also found the online giant broke its own rules around zero hour contracts.Amazon used 25,000 seasonal workers in 2020 however it did not fulfil its own pledges and agency workers were left dealing with a number of problems.It claims not to use.