Samsung after sales service SUCK

My galaxy S4 started to give problems after 10 months of use. It gets hot, hangs intermittently, restarts itself etc. We took the phone in (still under warranty). 2 or 3 weeks without a phone, it came back and they said problem solved. It still did EXACTLY the same, so I used it like that for a few months, very frustrating. Decided to take it in again, came back today, they replaced the screen and sensors they said. Switched it on, 2 minutes..... guess what? It hanged. Make funny stripes on the screen and I have to take out battery. <br> <br> During the time im typing this complaint, it restarted itself 3 times (and I type fast)!! Now it will probably work fine again for 3 hours or so. Then my family says why cant we get hold of you, I will say but my phone is in my pocket... check again.. it is off!!!! Cannot take it anymore, now what? Take it to Vodacom again, book in for repairs the third time, sit without a phone for 3 weeks again, get it back and it does the same again? I have wasted so much time with this piece of junk. I personally know of 3 people with the same issue. Funny thing, the tell them there is nothing wrong when it comes back from repairs. Was a Samsung fan, NOT ANYMORE!