Shocking Internet Speeds

When I called a few months ago to cancel my LTE Home Internet contract as it had expired and I was sick of shocking internet speeds. The agent I spoke to convinced me (stupid me to still believe them after all these years) to renew the contract with an upgrade to a 5G router and promises that I would get reliable 30Mbps download speeds (doesn't sound like much but it's way better than speeds of 5 Mbps and less!!). If anything, it is way worse with the new router. Right now, as I type this the speed is sitting at a download speed of 1.95 Mbps. Since early this morning and just about every day! When I called customer services to complain I was told "Everything looks fine on our side, I don't see any problems. The problem must be on your side - have you tried restarting your router etc."- the usual go-to nonsense they tell you to get rid of you. I have a full history of speed tests to back this up.