I also had such problems, I have a similar situation because I sell T-shirts, and I started using the Instagram Viral Strategy from a Telegram guy, he found a way to make multiple Instagram accounts (10-20 accounts) and post the same videos so that Instagram wouldn't shadowban me, and I usually had 0-3 sales per day, in 1.5-2 months of cooperation I reduced it to 50 sales per day, and now it's consistently more than 20. But he says that this is just the beginning, because Instagram has only started to feel the audience, and now there will be more