2008 Kia Sorento - Electrical issues

I have a Kia that last week had an engine issue that my SUV would seem to lose power. The mechanic said I need to replace the alternator and battery. Then four days later the whole electrical system on the Kia went out while I was driving. The AAA tower tried to jump the SUV but the vehicle didn’t even register the cable jump on the dash and would not turn over. WHAT IS THE ISSUE with my KIA? I did this happen to anyone out there?

There are a multitude of complaints about electrical issues with this kia model.