If you want your complaint page taken down you need to do both the following things:
Resolve the complaint with the customer either by meeting their resolution request or something that the customer finds acceptable. You need to show evidence that the customer has been satisfied and accept you actions.
Pay the cost of renting domain name, building website, placing on social media and maintaining correspondence with customer. Fixed fee of £500; Plus for every calendar month started after page registration date that the complaint is still valid, there is an admin fee of £50.