Damage of goods and bad service

I've got 4vodacom contracts and my wife had 2.Mostly everything in my household is sony appliances.I got myself a sony xperia m2 aque and what a lovely phone.I then bought for my wife the same phone with a screen protector and a silicon cover but after 5months what a disappointment.Her speaker didnt work and for some reason the one side of the cover had a crack.I went to vodacom repairs and booket the phone in for the speaker and the crack.The paper we filled in was for minor scratches on the cover and scratch on screen,the fix of the speaker and a quote on the cover because they say its my fault the cover cracked and the cover is not underwarrenty.i had to phone them back more than 4 weeks after to find out that JHB had no stock. Week 5 they phoned me and say the phone is back but they forgot about the quote.i told them to send it back for the quote and only by today me and my wife went to hear by them about the phone.they stated that JHB says its a right off and no quote can be given nor to fix it.When we received the phone back it had cracks all over the coners and the back side cover is pulling apart. Do you call this a happy customer and what to do in this situation?