LUDEX interview questions

I was invited for an initial interview for the Product Designer role at Ludex and met with the Director of HR. I was then given a task to redesign their existing scanning feature, with a short list of criteria and a deadline set for the end of the weekend (it was Wednesday). I delivered the design on time but received no response after submitting it. I noticed the CTO reviewing the file, but I still heard nothing back. This experience made me feel like I was exploited for free design work due to their lack of communication.