It was not broken - Front Camera S4

My S4 phone fell some time ago. The screen was cracked bottom right hand side. I took it in for 1st complimentary screen repair. They did not have screen stock. I was willing to wait. I contacted them in the week to confirm if the phone was ready. Their contact centre number is not on the repair receipt. After 3 phone calls I managed to get to the repair centre. I enquired about the phone and was informed that it was ready for collection. I collected it on Sun 8 Feb. After waiting 20mins (I had to ask for service) at the counter I was informed that the front camera was to be replaced at a cost of R600.00. I made it clear that everything was working 100% and the only problem was the cracked screen (bottom right). I was given a lame explanation and requested to speak to someone else. The person told me that when the screen is removed the camera has to be replaced. This is unacceptable. a) The phone was 100%, I used it to skype with in Dec and Jan (front camera). b) I was not informed there would be any charges, ever. c) The service was snooty and slow. d) The explanation was not technical but enunciated. e) Unacceptable - The phone was 100% operational. Front camera and all.