I am aware that it is a model that is a few years old but had hoped to get some help with why I cannot turn the machine on
What kind of help are you looking for?
Do you have a digital multimeter, and can you test live voltages? Most do not, and cannot, and unfortunately, there is no easy reset. This is a consumer grade product that is not designed for easy access and repair.
You can try a global reset by unplugging the unit from the wall, and press/hold the power button on the unit for 10 seconds. Then plug in and re-try.
Beyond that, there is nothing you can do short of opening it up and testing the circuit boards at various points to try and determine the failure.
I'm sorry you feel the service did not fulfill your needs, however not every problem can be solved easily as hoped.