Since I changed to fibre broadband a "You cannot make any changes to your account while there is a phone order in progress." message is shown so I couldn't renew my contract online.
My contract was recently up for renewal so I contacted plusnet to explain the issue and they went through the renewal with the reduced price over the phone, they set it all up and I received a confirmation e-mail.
Checking my account again a few weeks later the error message is still shown and I see a question in my profile with the discount information but every week there is a message stating "This ticket is being placed on hold for a week as the account is currently in a status where we cannot make any changes to the account." so it looks like this hasn't been actioned and I will still be charged the higher price when my next bill arrives.