Sorry if that caused you trouble. If your supplier keeps changing the price too often, I'd recommend looking for an alternative one. In case you cannot find a good alternative supplier, you can stop price auto-updates and your prices will stay the same regardless of changes in supplier's price. Here's how you do that: Go to Oberlo > Settings > Connected shops > Shops settings > Auto updates > on the section "When the cost changes" choose "Do nothing."
Let us know what you decided!