Impossible to get support

I have been trying to get support regarding an issue with my fibre installation for 2.5 Months now. I have lodged many tickets and emails which get a generic troubleshooting reply and are marked as resolved even if I explicity state otherwise. The call me back service simply does not work. If I get someone on the phone they are incapable of following through on any promises to call me back or check with the fibre provider.