Your situation completely depends on what the operating agreement says. This is a contract issue, and your rights are embodied in that contract.
If the agreement says that you get your capital investment before any distributions are made to owners, then you're in business. However, if it doesn't say anything about repaying you first - or at all - you're probably stuck with the 10% that you've legally got - and nothing more.
You should have an attorney review the agreement and tell you what you've agreed to - knowingly or unknowingly.
My suspicion is that the contract is written in a manner that only requires you to receive 10% and not an amount equal to your investment (but, had the business been successful, you would likely have made more under this setup). Also, you can expect the other owners to claim that they didn't put up cash, but they have equaled your investment with their time they invested.
You're going to need a lawyer to fight with them, and you should retain one asap.
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