Why i dont have new beginner deck?

I am a novice and have passed apprenticeship mode. I confirm that I have chosen a beginner deck, but I did not see it in my collection. May I know how to handle this bug

Have you already tried submitting a ticket to customer service? Sorry to say I’m not familiar with this bug to help you in any other way.

thanks for replieing ^^ how tosubmita ticket to customer service?

I Googled Hearthstone customer service and the first result was Blizzard support ticket. I think that should be the right page.