Repairs for more than 4 weeks

I sent my phone in to have the screen repaired. I booked it in on the 4th Sep 2015. Everyday if I phone they have the same story. There service is absolute pathetic. I don't understand how small shops can have stock of the screens but Samsung don't have stock. There turnaround time is suppose to be 24 hours, but now it seems to be 24 days. My ADH is expiring the 26th October 2015. If you phone to speak to a manager everybody seems to be busy or never there or they have not started working. This is a disgrasse really. I really won't refer anybody to Samsung anymore.