Poor service

On 15/1/2019 I called and spoke to Travis in the call centre to report that I could not receive calls and that all calls immediately went to voicemail. He told me there was a setting on my profile which needed to be amended and that I should put my phone off and on in 30 mins time. I did this and it was still not resolved. I called back and spoke to Sipiwe (ref 132) and she told me she had fixed it and tested it and it seemed to be working. She said she would call the next day to confirm and she did not call. Today again no calls are coming through. When I test from my landline it is not working. Can someone please assist?