Nonsense Letters and delaying tactics from Philip James Partnership

This nonsense letter (click on it to enlarge) was sent to the address of the property that I had vacated. Despite them having acknowledged receipt of the keys ten days earlier which, I had delivered by courier and contained my new address. Ms Beswick was regularly in contact by e-mail.
If you study the nonsense letter closely, you will see it appears to claim they "intend to carry out remedial works"  CLEAN KITCHEN CUPBOARDS
There is no price for the alleged "remedial work" only a statement telling me to write in (which I did) there is however, a note right at the bottom which states an ADDITIONAL administration charge of £150 will be made.

For the purpose of clarity, I wrote and asked why they had cleaned spotless cupboards and how much were they proposing to charge for this. I also asked for clarification of the ADDITIONAL administration charge.

That was a month ago, and I still have not received a reply. There is far more nonsense to come yet. Keep up your kind support.