Ongoing Speed and Service Issues with 50Mbps Fibre Line

I'm currently paying for a 50Mbps Fibre line (upload and download) with Vox, but the service has become increasingly frustrating. Despite the advertised speed, I'm consistently getting far below what I’m paying for, and the connection fluctuates wildly throughout the day. What’s most disappointing is the lack of proactive service. Every time there’s a problem,I’m forced to communicate and report it myself. Why doesn’t Vox have a system in place to automatically detect and address these performance drops? It’s unacceptable that paying customers must constantly chase after support to get what they’re already billed for. This has been an ongoing issue and I’m seriously questioning the value I’m getting for the monthly cost.