2003 Kia Sedona LX w/ 72.5k miles

In the last 3 weeks, I have gotten a new timing belt, brakes, 3 new spark plugs w/ wires, fuel injectors cleaned and now they say that I have replace a fuel injector. the reason they told me that F. I. 1,3 and 5 were misfiring then after the they were clened the #3 is still miss firing.

I need some advise…PLEASE…

Like what?

They cleaned the three injectors and even though #3 was cleaned it doesn’t work.

Change it.