iPhone 7 stopped working after service

I left a brand new iPhone7 with cracked screen and received back a defective phone. THEY RETURNED MY PHONE WITH THE HOME BUTTON NOT WORKING!!! The main upgrade from iPhone 6 to iPhone 7 is exactly the hole button and WEFIX makes sure you lose the functionality. I was led to believe that WEFIX was an Apple authorized repair center but they are NOT. BEWARE THAT THEY ARE NOT AN AUTHORIZED REPAIR CENTER SO YOUR WARRANTY IS VOIDED AND THEY HAVE ABSOLUTE NO RESPONSAVILITY FOR YOUR PHONE. Don't be fooled by a nice shopping mall store - they are not better than any corner dark store. THEY DON'T TELL YOU THAT THEY ARE NOT AN AUTHORIZED REPAIR CENTER - THEY WILL HIDE THISINFORMATION FROM YOU. They are one more **** repair center that simply replace defective parts not knowing exactly what they are doing since they are not trained by Apple. After checking Google I realized that the problem with the home button is happening with all iPhone 7 repaired by unauthorized repair centers such as WEFIX. I was informed by WEFIX staff that if they update the iOS the problem would not occur but it will always occur UNLESS YOU TAKE YOUR PHONE TO AN AUTHORIZED REPAIR CENTER. UNACCEPTABLE that the home button of my iPhone7 is not working anymore!