POOR after sales service

I did an online upgrade on 18 April 2020 (due to lockdown). With this everything went smoothly. After a couple of days I noticed that my phone battery did not last even 16 hours before needing to be charged again. I contacted Vodacom on 25 April. They said they would probably send couriers to fetch my phone. *They logged a query for the WRONG number. On 26 April I phoned them again and they "fixed" the situation. I have since phoned the online call centre at least once a week. You speak to a different consultant every time. They promise to get back to you. They say the matter has been EXCALATED. Every person (at least 8 different people/calls) let's me believe that the matter would be resolved within 48 hours or so. BUT NO!!! I NEVER HEAR FROM THEM AGAIN! IT HAS BEEN almost 40 DAYS and I am not getting any joy from them! (There is no manager available to speak to.) The Vodacom app and TOBI is NO HELP either.