Unfortunately, the information you received is true. An S Corporation is limited on charitable contributions to 10% of the taxable income.
Other than setting up your own 501(c)(3) non-profit program, the only other thing you can do is take the income from your S Corporation, and then make your donations out of your personal income. Generally, you can deduct cash contributions in full up to 50% of your personal adjusted gross income.
I know this was not probably the answer you were looking for, but those are the current IRS regulations.
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Thank you and good luck in your venture.