Software upgrade turned into tempering with device

<p>so for the first time in 2014 Oct I took my phone to ifix for software update, for which they charged me R200. I didn't mind cause my phone needed it, a Lady by the name of Lebo helped when I walked in, so I started asking more detailed questions and she called on a "manager" I suppose, who's name was Humphrey. He told me to leave my phone they will up date it, and that I should come back in 30mins, since it was busy at the store. I came back bought a car charger in the store paid and left. To date, my phone's screen broke, I took it to iStore, where it should go because of the warranty, to my surprise the inspection comes back and says I have voided my warranty because a third party tempered with my phone. Knowing which third party, I then sent them a mail to complain, no answer, I called them on 08.10.2016 Saturday, they couldn't even find the job card for the update.</p> <p> </p> <p>today being 10.10.2016, I receive a rather ****y response from Nigel the branch manager, who tells me they don't open phones without the costomers consent, which I bet to differ because here's my phone tempered with and a whole manager isn't bothered with investigating it</p>