Sneakily Sold Contract without telling me Price ( Online DEAL not Honoured)

[#1]

I complained to Plusnet about Not accessing any new deals online after my contract expires.

I eventually sawonline Full Fibre Deal 147 for £27 per month ( 18 months ) 

Customer Services called me and said they would put me onto Sales Team to arrange new contract deal.

Sales team said do you want Full Fibre 147  so i said yes ( as above ).

He NEVER Stated any Price ( prob my fault for just trusting it was online deal. ) 

When I just this minute got Email its read an astonishing  £40.04 per Month for 18 months.

I have re Complained to Cancel this contract immediately less than hour after they called me.

How do i ensure I am not charged for this Sneaky if not fraudulant con ?

[#2]

Sorry to hear this @diaboloseven 

I am going to send you a PM to get your username and then we can investigate this for you