Burns & bruises after Broadband Light went wrong - need help to review

I had my BBL on Oct. 18. When I looked at my self after the treatment I saw purple big patches on my face. A nurse practitioner told me that it's normal and it's pigments and these spots would turn brown and fall off. But what I can see that these spots are just bruising. On the next day a swelling was terrible. I returned to the office and was suggested to take prednisone to reduce the swelling. The procedure and medication made me feel miserable. I am on day 5 now. medication help with swelling, but I am not sure what to expect from the burn and bruises. I am terrified. I can see that patches are not turning brown, but rather fading slow like bruises. This is really because the procedure wasn't done in correct settings. Need help how to speak with doctor and will it go away?

It took more than a month to fade completely all bruises.
Likely my skin wasn’t damaged .
I will do IPL next time .
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