How to get premium hosting and .com domain for free using affiliates

I have 18 referrals in 000webhost affiliates marketing. But i don’t understand how i get my free paid hosting and .com domain for free? can anyone tell me.

@bipulhf Seems you have seen this,(This is wrong, information is not updated yet…and will be updated soon.)

Affiliate program have been changed
The only thing you can request is this(see in the below image.)

Hope this makes you clear.