You are obligated to pay ad valorem taxes regardless of receipt of the bill. Non-payment subjects the property to foreclosure. Failure of service might give you the opportunity to redeem the property if sold at foreclosure, and could require the tax office to have to redo its filings, but the tax office has no obligation to agree to installment payments of any kind. I would hire an attorney to raise your issues and try and negotiate, but the bottom line will still be, pay the taxes or risk losing the property.
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