Estate agent has not listed property correctly

[motorbiking]

I have an important question.
The contract was cancelled in writing as per the agents contract insisted.
The contract came to an end, but the agent didn't remove the property from their website as instructed nor from one of the bigger property sites!
No new contract has been signed.
New viewings have been happening after the contract finished.

I think a court would find that if you continue to allow them to arrange viewings with potential buyers then you are under contract, despite serving notice.

If you no longer want to do business with them then don't accept any further viewings and remind them of the notice to quit served