Broadband disconnects several times a day

Hi everyone, I've had Nexora fibre broadband for about 3 months now, but recently it keeps dropping out multiple times a day. I've rebooted the router a few times and made sure cables are secure, but it doesn't seem to help. My speeds also feel much slower than what I was promised. Is anyone else having these problems? Not sure if I should call support or if it's a known issue.