The easier option which i am now going to follow is to seek services from another provider that does WLR services. such as TalkTalk. sign upto them for phone side and ask that you not have the broadband and the service change will kick plusnet off the line leaving your line clear and then sign up with another provider.
Plusnet have screwed me around massively and their service is getting worse. Half the time i have a connection i cant even use it due to teh 2nd hop within their network killing my connection. ive asked for help and they dont give a flying stuff.
I signed up and was told the modem would be free. now they want to charge for it if i cease.
I was never given an opt out option when they changed the fair usage policy either which has royally peev'ed me off now as i would have taken it
Internal complaints procedure doesnt work. ive asked for a higher level complaints team contact and no joy still and also asked if it would help if asked watchdog or the like to look into the issue.
Ofcom will take an age to do anything and the easiest option is to just cease the phone line to be honest and create a stop start on the line to remove the services.