No broadband

Started with a message that stated our hub hadn’t been installed correctly, this was whilst I was running tests through the Virgin media app due to intermittent problems.
After days of problems eventually booked an engineer appointment. Engineer changed the connections to hub, connection at wall and outside box said they were over 15 years old. Everything seemed ok. He asked me to see how it went for couple of days. Did mention I might need a new hub (said they don’t carry anymore in short supply) we have superhub 3. Left phone no to let him know. Soon started playing up again. I messaged him worse than ever. He replied that he’d informed management but they weren’t back to next Monday!!!!
For over a week now no internet on and off. Tried phoning Virgin !!!! Left message for call back no call back. Virgin seems to be in a complete mess. I purchased Ethernet cable as suggested straight to Mac from hub nothing. I’ve done all the disconnecting, reconnecting etc they suggest. Not great on internet any suggestions. Not worth trying to get in touch with Virgin again. After over 20 years think it’s time to move when contracts up.