4 Diolaze treatments so far, with no results. I have red/blonde/golden pigmented light brown hair. Should I continue? (Photo)

I've read everywhere that between 4-6 treatments are when best results happen, I'm aware more would be required realistically but I've had 4 and I have very little progress. I've got bikini and underarm and it always goes - Lazer treatment, hair falls out, hair grows back slowly, full hair growth comes back with no or very little change. I have light brown hair with very red/golden undertones & very pale skin. I strongly feel I'm wasting my money, should I continue?