Will slinging a power steering belt cause loss of power wont start

I suggest you make sure you watch mechanics​ while they work on your car cus they often fix one thing for a great price and establish trust and then they may fix one thing but also set up something else to break over time and you will continue to keep on going back to them with the thought that they are looking out for your cars best interest. Bottom line is, unless it's under warranty and being financed then do it yourself. It's more rewarding when you figure out how to fix it by yourself and it will save you thousands of dollars.