Bailiff fees

[Guest]

Hi. I recently had Rundles bailiffs at my door to collect unpaid council tax. The council had obtained a liability order at the magistrates court. I paid the council directly, but Rundles have now sent me a letter saying I owe them £310 for their fees, under the liability order. Are the fees Rundles add, part of the liability order? The collection fees are added afterwards so am a bit confused.* Thank you for any advice you can offer.