Problem with discount eligibility

So a few days ago i decided to buy 20$ worth of premium stash tabs through steam.Today i decided to upgrade to the 30$ supporter pack , the problem is that on the official path of exile website it says that i'm eligible for this kind of upgrade but on steam it asks for 30$ instead of 10$.I only can pay through steam wallet , is there a solution to this?
I already sent an email regarding this problem to support@grindinggear.com but i received no reply.
Support usually replies very fast but right now they are probably still busy with beta business. So just give them some more time, they'll get back to you. :-)

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