Sorry to hear of the broadband speed issues and device registration problems experienced, we appreciate you raising these via the forums.
Can you confirm how you're testing the speeds? We would always recommend running a wired speed tests via ethernet from the Hub to a laptop or PC ensuring it is capable of supporting the speeds. We have help here in regards to speed tests and how to perform them.
From checking the speeds over the last week they have consistently been above 136mbs download and 20mbs upload. There has been some disconnection over the last couple of days but clear before then. From checking the equipment though there does appear to be some issues with the downstream power levels which may require a technician.
I will send you a Private Message to get some more details from you to arrange a visit.