You need to take a scientific approach you your issue. Drive your car and then push brakes couple of times and approach your station but this time, stop using manual brake.
Take off your wheel and inspect caliper. Is pad loose in it? Is is crooked? Then let someone push the brake and watch what happens - does pad come in contact with rotor? Does it retract?
You may dealing with stuck caliper piston or improperly installed pad. Or the noise is completely something else
Next - not Mazda
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