So I did a little digging and came up with this interesting bit of information from the Terms and Conditions agreememt Konami and all other developers have with Google:
3.6 You Support Your Product. Buyers are instructed to contact the developer concerning any defects or performance issues in applications downloaded and installed from Google Play. You will be solely responsible for, and Google will have no responsibility to undertake or handle support and maintenance of your Products and any complaints about your Products. You must supply and maintain valid and accurate contact information that will be displayed in each application detail page on the Store and made available to users for customer support and legal purposes. For paid Products or in-app transactions, you must respond to customer support enquiries within three (3) working days, and within 24 hours to any support or Product concerns stated to be urgent by Google. Failure to provide adequate information or support for your Products may result in low Product ratings, less prominent product exposure, low sales, billing disputes or removal from the Store.
I'm curious to the terms and conditions of duel links itself....does it anywhere state that you need to link your account to konami's website? Dont remember that being there? When you get the game do they tell you make konami account and link it to your duel links account? NOOO. So I want ppl to stop for a sec and think....why isn't this information available online? IDK every other game does
Well if you were serious about contacting your attourney, the excerpt I posted is probably your best starting point. I didn't lose any money myself, but hopefully this helps if anyone wants to band together and make a case if you want to go that route.