How do I stop getting bad service and surprises from vendors?

When a vendor lets you down, it feels personal. But most bad service grows out of a fuzzy agreement. If what you wanted was never made clear, the vendor fills the gaps in their own favor, and you get hit with surprises. That is not bad luck. It is a system with holes in it, and you can close them. You cannot make a vendor care, but you can make your expectations plain. Before the work starts, write down what good looks like: what gets delivered, by when, at what price, and what happens if it slips. A vendor who knows you are paying close attention behaves differently than one who thinks no one is watching. Pick your worst vendor this week. Write down the three things you actually need from them and send it, asking them to confirm in writing. That one clear message will show you more about who you are dealing with than a year of hoping things improve on their own.