Yea your advice given was very wrong.
Most souls have enough to support about 4 weeks of active plant growth. Usually some supplement this veg cycle with a wee bit of veg food.
At flip u need to keep feeding veg along with bloom nutrients.
At about week 3-4 when bids start popping and forming, you would cut back veg and increase bloom feeds taking note that a higher P number in the NPK ratios. Phosphorus expands roots, and helps maintain good plant vigor during the stage that uses everything the leaves have stored and soil can give.
so absent of feeding, you may have a massive deficiencies and or lock out.
pics are hard to tell from. But I would try a course correcting method via adding some veg, more bloom feedings for a few weeks. And hoping she recovers , she also needs macro nutrients. Your local grow shop has them I hope. But any line would be ok. ofcourse organic is better but since she is potentially starving , go synthetic and it’s readily available, follow mfg guidelines on feeding and let’s hope she recovers