FNB Business Leaves Sour Taste In My Mouth

I need assistance with my business account. I currently cannot link it to my app. I cannot make payments using it online. When I call in, nobody can hear me. An issue that is unique to the business account as the private client call centre hears me just fine. This has been happening for months and I am beyond frustrated. I'd like to set up my business solutions so I can pay myself a salary, however as it stands, I am not afforded the use of basic amenities.