Appalling service from 1-grid

Last year 1-grid restructured my package without my consent. When I asked why I was paying over R60 more for their services, I was told that my package was no longer offered and they have moved me to the next available package. I requested a support agent to contact me to explain the different packages to understand if the new package was suitable for my business. I waited for weeks for them to get in contact with me. We subsequently agreed to a restructured package, based on my needs, and a sales agent was to call me to make this possible. In the meantime, I continued paying the subscription that I paid for my old package. It is now March and this matter is still not resolved. I call them every month end after my service has been disconnected due to insufficient payment. I use my mobile phone to call them and each call lasts on average 24 mins. Every agent tells me that someone from sales will call me and 30 days later, no one from sales has called. Instead I get invoice reminders telling me that my services will be terminated if I do not pay the full amount. I even tried their chat line on their website and no-one responded. I don't know if it still works. I am exhausted by this and disgusted at the poor service that I am getting from 1-grid.