repairs

<p>I booked in my phone for repair towards end of last year with cracked screen which is s4 and it was registered under ADH cover and they fixed my phone. Ever since it got back from repairs it started giving me problems it was freezing, deleting all the apps im downloading and kept on restarting. I went to telkom store and they did everything in their powers to help me until it started doing emegency calls only. I went back to the shop to book it in and im given a quotation of 4.8 thousand to fix the problem cause its no longer under the guarantee and they say the screen is damaged nd when i booked it in there was no cracked screen. How can they charge me 4.8 for network problem and that occurred after it came back from them? And its a technical problem not physical damege.</p>