Multiple BSODs while playing Hearthstone, error 0xa0000001

So I contacted the AMD support and they told me that it was an issue with the game because it wasn't optimized for amd GPU or something like that (basically they didn't know and said it was because of the game devs). Does that mean I'll have to buy a new GPU ? (which really sucks since I'm 14 and I don't have that much money) Or is there another solution ?

I guess I have no other choice, too sad I can't play that game anymore I was getting pretty good ranking and wanted to start doing tournaments. Also I never got a BSOD in any other game so I don't think the GPU has a problem.
Anyway I'd like to thank you a lot for all the help you provided, I really appreciate it!

I'll probably get money for my birthday in november, I'll try to see If I can buy a decent Nvidia GPU then.

The only thing that I don't get is why does that crash only happens to some people and not everyone who owns a amd GPU? For example my little brother has the same PC and an amd GPU but he can play the game just fine.
(Sorry for asking that many questions, I know it's anoying but I'd really like to understand how that stuff works)

Ok thanks for answering, I guess I just wasn't lucky enough then :/

Sorry, it's me again, after looking up on the internet about that bsod I found out that a lot of people are having the same issue with different games (and non-gaming related softwares) and I found that post on guru3d: FIX BSOD ATI Blue screen on atikmdag.sys solved fix - Guru3D.com Forums
Do you think that could fix the issue? I didn't want to try it right away because I don't want to break anything.