I’m sorry, that’s got to be frustrating.
It can be kind of tricky the first time you try soldering these jumpers. Try using more solder and quickly rubbing the tip of the soldering iron across both pads until they stick together. You’re basically scraping across the surface of the PCB very lightly and quickly while you add more solder.
You can always just use a very short piece of wire too, like a lead that you cut off a resistor earlier, to jump between them. Use a very short length (about 1/8″ max), hold it with some tweezers as you bridge the jumpers.
Sorry for the frustration, and good luck.
-Brach