Second faulty phone on upgrade

I am once again experiencing sitting without a phone. I upgraded in September (3 months ago) to the Sony M4 Aqua, after having the phone for 3 days the LED bulb in the screen of the phone blew. After waiting THREE WEEKS, they replaced the phone which was ridiculous to begin with - the phone should have been replaced immediately but it was sent all the way to Johannesberg when you could clearly see the problem. Now I am on the second replacement Sony and last Friday, the 4th of December I had to book the phone in again as the usb charge plug is faultly (only after 3 months of having the phone). I have never experienced such a problem with any branded phone - I would never recommend any Sony mobile to anyone. When I went in to your branch to book the phone in on friday, your system was offline. Stood in the shop for basically an hour just to book the phone in. I phoned them now to get more details regarding the phone, but all I was told is we not a repair centre - I must call the repair centre. To this point I do not know where the phone is??? I I am very frustrated with this phone brand, as again I am sitting without a phone for who knows how many weeks to come.