Not much they can do either - both you and Now are in the cold, dead, hands of BT Openreach.
But I will keep banging on that Now is domestic broadband, which WFH exposes the limitations of; and in fairness, the limitations of many other suppliers of domestic broadband.
If my BT landline goes down, though it will automatically cutover to cellular in just under three minutes. a service good enough for the 24/7 remote tech support I provide, which the landline alone wouldn’t be.
Signature:- Please do not say ‘you’ in your posting and imagine you are talking to any employees of Now. Generally, we are all customers like yourself, who can’t help with billing or other queries that only Now can answer 😞