Heirloom Not Out

Im not sure if it's a bug or not but I recently got heirloom shards and decided to wait for the grand slam heirloom to come to the mythic store for shards. I wait for the event to finish and decide to go and buy it in the mythic store and realise you can't buy it. Im like oh that's strange and give it the benefit of doubt and wait for the season to finish. (Over 2 weeks since the grand slam event finishes and 3 weeks since I got heirloom shards) surprisingly the heirloom is still not available in the mythic store it just brings me to the event store even though the event is over. EA please fix this ive been holding onto the shards ages and cant get the heirloom I want for shards.