Same case as me.

I bought Chromecasts say Free iFlix Voucher, after received, found out haven't send me, then I check the description, the FREE already gone. Yes GONE, They removed the description. Then I email them, 2 weeks later no respond, I reply fark them 2 weeks no people dare to respond my email, 3 hours after I scold them, iflix voucher in my email already.

I leave a 1 star rating on the products, I say, next time, when have free stuff, make sure printscreen / screenshots it. Otherwise, they will broke the promise.

But I'm lucky, they willing to fullfiled my request, that guys doesn't as lucky as I do.