broken new phone

I bought a Samsung Galaxy Grand New cash on 11.04.2015. About 3 weeks later I discovered tje music icon is not on my phone. The person in the shop tried to contac the rep but could not get hold of him. The following weekend I went back and they tried to fix the phone in the shop. At that time I also discovered that my sms is not properly working. It doesnt show an incoming message and when I go in it shows already read. They again tried to fix the phone in the shop. The following weekend I went back with all the same problems. They took the phone in and before I arrived home, got a message to come and collect the phone. I went there the followjng day and the phone was not even looked at. They were supposed to send the phone away for repairs. Its now almost three weeks later and they keep telling me my phone is priority and at the advanced repairs. <br> For goodness sake, this is a brand new phone which I paid cash for and have not even used properly. I'm so disapointed in the service I got. Seems to me they just cant fix it - I now want either my money back or a new phone. I lost business by using a phone that did not work as it was supposed to