Eyeliner missing in center of my eyes. Should I go back for a "touch up", or find someone new? How do I know who to trust?

I heard "snip snip snip", did she microblade my eyeliner? I wanted it thicker on top, to look like I was wearing eyeliner.You can't tell anything was done, unless you look very closely, and then, the colour is only on the upper edges - it's completely missing in the centers of my eyes. Is this normal? Should I go back to her for a "touch up"(not included in her fee)? Or should I seek out a new person and start all over? Thank you SO much!

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