Why are Plusnet asking for the cessation fee when they say it doesn't apply?

[#1]

I got TalkTalk installed yesterday 27th March. I had just let my plusnet internet, no contract, run as normal until the TalkTalk was set up.
Once TalkTalk was up and running I cancelled Plusnet & was told I had to pay the £30 cessation fee.
on the plusnet site it clearly states that...
"Cessation charges don't apply if:
You're a customer without a contract on any of the following products:
Plusnet Essentials
Unlimited"
(I was on unlimited).
So are plusnet contradicting their own website?
I'm also a bit suspicious of the whole thing as the engineer from Openreach had to go to the exchange to change my line etc there and then.
Can anyone shed any light?

[#2]

Hi there,
Just checked your account for you and this is correct. Due to the package which you signed up for no cessation fee is applicable. I have added the note to you account to this effect. Sorry for the confusion 

[#3]

Thank you for sorting this out for me.
Regardless of what anyone else says...during the past few years I've been with Plusnet I must say the customer service has generally been excellent - sorted out all queries I've had efficiently.
thank you and goodbye for now!

[#4]

Thank you for your gratitude it is always nice to hear.
I wish you all the best with your new service provider.