Why did the BBL HERO not work?

I'm desperate. I've been trying to get rid of freckles for years and I can't. I spent large sums to do the BBL HERO FILTER 515 on all of my arms, but NO results. at the first session absolutely nothing, the spots did not darken. the skin remained the same. in the second session, the settings are increased, up to 22 joules. the same day the skin is a little hot, the next day I have bruises but again, no dark spots. No fading Freckles ... my doctor dont know why