I moved to a new FTTP enabled flat in Sept 2018 where I ordered Zen's 150/30 "Unlimited Full Fibre 3" package. After a year I regraded to Zen's 330/50 package where there was an initial issue with the profile not being changed by Openreach(?). I appear to be limited to a 30 Mbps upload speed and Zen's tech support can't seem to find a problem - tried various router and speed tests and still no different.
The only service I see in DSLchecker is WBC FTTP 1000/220. My fritzbox is configured to Throughput: ​↓ 337,9 Mbit/s ↑ 51,2 Mbit/s.
Do you think I'm being fobbed off by Zen's tech support and there is a problem with the profile I'm on? I expected closer to 50Mbps upload.