I assume you were tricked into the "SMART" subscription by GAMIVO? It is listed when you let gg.deals display the risks for the store (marked 'Paid “buyer protection”') but I believe the warning should be more prominent to alarm users to actively check for the protection durign checkout. Unfortunately they are not the only marketplace to offer such a subscription trap.
Any store trying such deceptive strategies, as well as adding "service fees" at checkout (looking at you, etail.market) should be avoided, tbh.