After days of trying the rules I now used If from contains @names.xxxx then discard which may be working.
Also I forwarded the emails to the National Cyber Security Centre at report@phishing.gov.uk
They acknowledged several of the emails.
I sent one to BT as it was blatantly imitating BT.
The nuisance emails have stopped, might be the rule who knows or the NCSC have stopped them.
I was getting up to 15 emails a day at one point.
It is definitely worth reporting nuisance emails.
Good luck🤞