I have bad audio on calls, could this be a fault with my broadband?

Yes, the most common cause of call audio quality issues is the quality and capacity of the Internet connection. The first port of call would be to check your Internet connection using a speed test. You can also reboot the router as this commonly resolves some issues. If your tests come back ok or you need any other advice, we can run a trace on your Internet connection to discover what the issue could be.