Gears of War 4 xbox one, how to get the entire gears of war collection for free?

Ok, so my brother bought the gears of war xbox as he wanted a new xbox s, the new gears of war and the season pass. (Plus all older gears of wars as advertised by amazon.)All for £400, a good deal right? Well it turns out when he looks at any of the old
gears of wars in the store, they are not free, they all require him paying the full amount (£15 if i remember correctly). Does anyone know how he gets the free gears of wars for free as amazon advertised? Thankyou

:)

 

Xbox Gears of War 4 and did not receive xbox 360 collection bonus codes

I purchased Gears of war 4 bundle, and have not received the Xbox 360 entire gears of war collection (playable on xbox one) as described bundle description (for Ultimate Edition Gears of War 4)

 

Normal gears 4 but no collection

So I bought gears of war 4 the normal $60 version. In the description the last sentence says

" For a limited time, purchase and redeem your copy of Gears of War 4 and get the entire Xbox 360 Gears of War collection for use on Xbox One!*"

But I have been playing Gears of war 4 for a week and haven't received anything for the 360 collection.

Help me! Thank you!!

 

You need to wait for your turn in the code waves

 

If it is a code rather then a disk you need to wait for.the code wavea

If it's a disk you need to talk to the retailer