Kit Willow says leaving her brand was a "devastating" loss.
In November it was reported the Australian designer had been "dismissed" from the label she set up.
Now she has opened up about her departure from Willow.
"I could never have imagined that what has happened would happen," Willow has told Vogue.co.uk.
"It's devastating not to be involved in something that I started a decade ago, and something that I have nurtured and grown over the past 10 years. My family and beautiful friends have been incredible, but of course it's been very difficult."
The designer is a big name in the fashion industry and has hung out with top models such as Cara and Poppy Delevingne.
"A design-led fashion business is a very different entity to other companies," Willow said. "It has a heart and soul, and has a very personal relationship with the customer.
"For me, designing is almost like being a mother; so I always have the urge to do it, to create something. I've taken a lot of comfort from the fact that the brand lies inside my heart, and wherever I plant it next is where it will grow."
While it was originally reported that the designer had decided to leave, it later emerged she had apparently been "ousted" by The Apparel Group, which took out a stake in Willow in 2011.
It is thought the designer is taking legal action against the group.