Disgusting customer service

I have a phone in for repair, I was told it would take roughly 14 working days to repair the device, It has now been over a month, After constant phoning, and asking for info I get told that they are waiting for feedback from the supplier, They are quick to take my monthly premium, but not do anything about the return of my device. I have even asked to speak to a supervisor or someone that can do something about this, but have been told that there is no supervisor available every time I phone, I have called over 14 times, at different times, and get the same scripted response, They do not even have the decency to call me back EVER!!!!