Loud Screetching noise when reversing on 2003 Mitsubishi Outlander

I have just had my cam belt replaced and now my car makes a load screetching noise when reversing? Is this to do with the cam belt or would it be another problem?

Asked by for the 2003 Mitsubishi Outlander
You should take this back to the shop that did the work, it sounds like a possible loose belt.