Free Beats Flex Promotion

Hi,

A few weeks ago I applied via the Unidays for the promotion for free Beats flex headphones following new subscriptions for Apple music as a student. I subscribed at this point and was started on the first month of free Apple music and am yet to pay for my first month as per the student subscription. However, I noticed after a few weeks that the promotion disappeared from the Unidays website. Am I still eligible for the promotion as I signed up for apple music when it was still live or has the promotion expired and I am no longer eligible for the free Beats headphones once I start paying my student apple music subscription?

Thanks