72 Days Logged On Apex/ No Heirloom

You are guaranteed heirloom shards upon opening 500 packs. Some get lucky and get those shards right away, some not till closer to the 500 pack mark. Its luck of the draw. 

Good luck. 

Never seen any guarantees and I know people that are over 500 and haven't gotten them. I have 3 and have been playing the game for a few years. It takes a while that's for sure. I've only spent $10 on the game during all that time, so I don't think what you spend has anything to do with it. 

I have also heard others that opened up more than 500 packs and still didn't receive heirloom shards. 

And well, you can't always believe what Respawn tells you.