Do not pay the marketing charge!
Haart were useless. They brought round 4 people during the 16 weeks of our contract. When the contract ended they demanded that we pay £150 + VAT as a "Marketing charge". They threatened us with court.
I told them basically "bring it on" and quoted the CTCCR. They eventually chickened out and dropped the case. It was nothing more than an attempt to intimidate us.
So, do not use Haart to sell your house. If you are already with them, do NOT pay the hidden "marketing charge".