Minga London interview questions

worst interview experience ever! was asked to complete extremely detailed 7/8 part task. took a huge amount of time, energy. they got back saying they loved it and would like to schedule an interview. Before we can confirm a date they ghost me. After following up multiple times I still hear nothing from them. A few weeks later to my surprise they release the collection the task was based around (I assumed the collection was hypothetical) they clearly used some of my ideas and it became clear they just used these "interview tasks" as a way to steal ideas from creatives, I've also heard they steal designs too for their clothes, stay away from this company!