I need a way to fix this mesh.
It has way too many faces and when I import the
.stl file to other programs it gives me a
broken polygon message. I want to 3D print this object in matter control once I fix the problem.
The easiest way to reduce the vertex count on a model is probably to use the Decimate modifier. Basically it tries to simplify a mesh, without loosing too much detail. There are also multiple modes, for finer control, but the default one should do for most cases.
What you need to do is, with your object selected, to go to the modifier tab of the Properties window and add a Decimate modifier. I encourage you to play around with the multiple settings and modes to see which best suits your needs.