Frustrated and disappointed with Vodacom repairs centre Centurion

On the 29 of April 2019 I went to Vodacom Centurion Mall to the repair center with my Hauwei P20 Pro, I experienced problems with the phone for the past 3 months after receiving or making a call I can't seem to use the phone as the phone opens and closes all Apps by itself. I explained my problem to the person but he did not even have a look at my phone, he booked it in I signed papers and off I went. I did not even receive a sms stating that the phone was booked in nothing. 3 weeks later I phone the shop and they said that the phoned me the next day 30 April 2019 to come and collect the phone. I said that I did not receive any call of that nature and how can this phone been fixed in less than a day. The person explain that they did a software update, I am not a technical person but my logical mind said that this is not a software problem, I asked to speak with the manager of their department. After speaking with him he said that he will use the phone for 2 days to see what it is doing, he phoned back and said that he saw what was happening and the will again update the software. Again I told him that I don't think it is software. Then he phone me to come and collect the phone and so I did. Upon arriving home I started downloading all my apps and it started doing the same, I thought I maybe touched the screen by accident and thought to use the phone for a week and if it does the same I will take it back. On the 29 May 2019 I took the phone back as it was so bad that I couldn't even end a call after phoning, I saw the manager that day and he as well struggled with the phone, this time when he booked it in I received an sms. On that same day I got a message "Vodacom repairs job no. ********** 6 has been sent to the advance repair centre for a higher level repair". On the 30 May 2019 I received a sms "Vodacom repairs job no ********** 6 is currently in the assessment process at the advanced repair centre. On the 31 May 2019 I received a sms "Vodacom repairs job no. ********** 6 in being sent to Vodacom repars centurion. You will be informed of collection upon arrivalat store". On the 3rd June 2019 I received a sms "Job number ********** 6 is currently in the exchanged process". At this stage I phoned the store asking to talk to the manager he explain that they could not fix the phone and will exchange it but the phone that they were going to exchange it with is also broken and need to be sent to get fixed he will phone me back. Now it is again a week later I have not hear anything yet, I phoned to speak to the manager again but I was told that he just left the shop so I asked to speak to some one, they said they will phone me back. After an hour waiting I phoned again and expressed my utter disappointment as no one seems to phone me back she took my number and said that the next in charge will phone me and here I am still waiting. I am currently so frustrated at the moment I have been paying for a phone for two months that I was not been able to use. And no one is seems to get back to me regarding this. I pay insurance every month on this phone. Please please can someone just help me. I am struggling to get answers and to get this phone replaced. Kind Regards Natanya Human **********