Heirlooms

You probably won't. I opened over 500 packs as well on November 30th on my PlayStation , but they say it's a "bug" and they refuse to fix it. They also were dumb enough to ask if it was in the policy for the guaranteed heirloom at 500 packs, even though it's never changed for the past five years

ONdaASH​

Its often the case of an overestimate of appropiate opened packs. 

Have a read of this for more info that may help you:

Where-are-my-heirloom-shards

Best of luck