Sorry to hear that!

Water, compost, maybe even weak acid like vinegar water. But first, you should have the pH tested to see how bad the problem is. And don't use a cheap hardware store soil kit. Take a sample from a couple different spots and deliver it to your county extension office. It might cost a couple bucks but it will pay for itself in avoiding further mistakes.

Call the Extension office before you go. Not all test soil these days. If not, they can tell you where to take/send for a test.

Contact your counties office of your University of Missouri USDA Cooperative Extension Service and inquire about having a good, reliable soil test done so you know what your soils pH is and why it is there and what needs to be done to correct it and to get an idea about the nutrient balance of your soil.
As you have seen wood ash, 25 percent Calcium Carbonate
(lime), is not always a good addition to soil and can create problems if you do not know what the nutrient level and pH of your soil is. Many people will tell you that "my grandfather" always added wood ash to the garden (I know of grandfathers that also added coal ash and used Paris Green [Arsenic]) without understanding that grandfather probably also added other things that probably balanced those wood ashes.

Here is a link that might be useful: UM CES

Oh, you're in Missouri! I missed that. Whereabouts?

Vegetables like a more acid soil than most people realize, or at least than *I* realized until the first time I saw this page. :)

The fastest easiest way to make it acid is to add elemental garden sulfur--NOT aluminum sulfate or ammonium sulfate, BTW. Garden sulfur is just a yellow dust, and you have to till it into the soil for it to be oxidized by bacteria to sulfuric acid.

Here is a link that might be useful: Soil pH requirements

The pH range plants will grow in and the pH range that most soil nutrients are most availble for plants to use can be, and are, two very different things. Optimal soil pH, where most all soil born nutrients are most readily available, is between 6.2 and 6.8 and that is what you should aim for in a soil pH for most plants.