Many thanks for your post and sorry to hear about the issue concerning your broadband speed.
I've located your account and I am unable to detect and issues with either the equipment or network segment at present.
I can, however, see that you're utilising modem mode at present. It may be worth disconnecting any third party equipment from ours and testing ours alone while still in modem mode with an Ethernet connection direct to a laptop/computer. If you could then post your results here once more, I will be more than happy to take another look.