I am on a month to month contract with insurance for my braces can I get them removed? (photos)

I am very dissatisfied with the braces because the doctor estimated me to have them for 2 years and its been about 3 years now & every time that I go, assistant will work on me, not the actual doctor. I feel because the doctor isn't the one working on me the work isn't done properly. EVERY visit I go there is something missing or broken. My teeth feel sore all the time & my gums are clearly swollen they are growing around brackets and under the wires. The contract was for 2 years its been 3.

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