Cellphone Repair/Refund

I am writing this review to expressed my disappointment. On the 13th June I bought a cellphone in Pinetown-Pinecrest branch, It was activated at the store. Later on the same day when trying to do a sim swap using the same phone I could not. I also tried calling the number it was not going through. The next day the (14th) I went to the shop in Watercrest Mall since its closer to home, the manager and the lady at the door assisted me. They switched it on and off and it started working.. Later that day again it was doing the same thing. Calls was going on voicemail while the phone was ON. I decided to call Vodacom, the consultant advised to have it off since I had just did the sim swap she will give me a call. Of which she did.. its seemed to be working perfectly. Then again it did the same thing(Tues) I phoned Vodacom. The consultant said she has checked all that can cause such(call diverts..) and everything seemed fine on her side. It seemed to work when its being switched on and off. On Thursday I went back to the pinetown store got there when they had just closed. I was advised to come the next day. I only went back to the shop on Saturday which was the 7TH day from the day of purchase. I told the lady the whole story.. she also phoned me and its did exactly the same thing-voicemail while its on. She advised me to go to the Vodacom shop so they can check it.Mainly to establish whether its network or the phone problem.After waiting in such a long queue the consultant in Vodacom said he cant actually help because its a new phone. I will have to put the sim card on the different phone. Went back to the store she then decided to put a new sim card. Of which its worked mainly because the phone has been restarted. Asked her numerous time what happens if its happens again since from Vodacom side they do not see any problem and this occurs intermittently. She just said it will be sent for repairs. I said to her you have tested it as well when i came in and it did the same thing. She said well its did not happen with the new sim card-she cant exchange it. it was my word against hers. LATER that day it did the same thing and i phoned the store and its was not answered. Because of my commitments I could not make to get to the store during weekdays. On Saturday(23th- the 10th day)) was back at the store after explaining the story to the manager.. She just said Oh well we will have to book your phone for repairs that is all she can help me with.. I actually did not expect all this I bought the phone since I needed it urgently for work purposes after my other phone was ******. Now this is secondary trauma. I am sitting here without a phone or my money.. I am very disappointment at Ackermans service.