First there is no software that can partially crack Ethereum seed phrases, once lost that's the end of the wallet, if there is, many people will know about it. Also, try checking the words to ensure they are spelt correctly, check the letters to ensure the are correctly marching the words. However, another idea you can try is, since you said the 12 words are correct, import the wallet to another wallet app like Imtoken or trust wallet or whichever you want; if the words are correct it will import and you can see your assets. Lastly, just a suggestion, in case of another time, write the 12 words twice in different places if possible before completing the wallet creation, just to ensure there is no discrepancies.