I bought 12,000 toricredits for 10 dollars on steam but it said the transaction failed. So i tried to buy it again and it failed once more. After that, i realized that it still charged me so i now have 7 dollars in my steam wallet instead of 17 dollars and i'm still stuck with 180 toricredits.

This seems like something steam could solve for you. Since it's their fault. This should help. https://support.steampowered.com/kb_...4453-WGHZ-7934