Fixed! Go to the fix.
Welcome to the forum @Janeeziboy8912
I would be inclined to run through the checks at https://www.plus.net/help/broadband/connection-troubleshooting/ and then report a fault at https://www.plus.net/apps/kbdfaults
It takes a bit of your time but makes Plusnet aware of your problem, makes them look at it, and gets the problem into the queue for action. And avoids the issues with chat and the phone.
Re: Router keeps flashing orange
Not when this "A fatal website error 'Mvc_HttpVariableNameConflictException' occured, please try later." appears using the fault reporting link.
They hide it well too.