The owners of collapsed activewear brand Stax have revealed the past few weeks since appointing liquidators have been “the most difficult chapter” of their lives. Stax, which sold activewear online and at two stores in Sydney, was placed into receivership in June and liquidators were appointed last Friday.In a lengthy post on social media on Tuesday, co-founders Don Robertson and Matilda Murray acknowledged that customers were “frustrated, disappointed and understandably upset” that orders had not been fulfilled.“I want you to know that we have heard you,” their statement read.“First and foremost, we’re truly sorry for this and for not communicating earlier.“Stax was built over more than a decade with an incredible community and knowing that so many of our customers have been impacted is something we carry every day.”The pair said with the company now in the hands of receivers, outstanding orders had to go through a process.“I know that doesn’t change the frustration or disappointment so many of you are feeling,” they said.“If you placed an order and haven’t received it, we completely understand why you’re upset.”They said customers should contact their credit card or bank to “ask about the options available”, including a possible chargeback process.“Thank you as well to those who have shown us kindness during what has been the most difficult chapter of our lives,” they said.The business appointed Brian Silvia and Michael Hird of Cascap Advisory as joint liquidators for multiple Stax entities.Last month, in a desperate bid to keep the business alive, the co-founders sold off retail stores and luxury vehicles, including a Lamborghini and a Porsche.Founded in 2015, and officially registered in Western Australia in October 2017, Stax grew from a grassroots label into a competitor to international heavyweights like Lululemon, Nike and Adidas.During its peak, the business had a turnover of more than $30m a year and employed 160 staff.