<Your address> 
<Postcode>

09 October 2020

<Your landlord's address>

Dear <Mr/Mrs/Ms Landlord>, 

Re: Request for repairs at <your address>

Further to my letter of <date of last letter>, I am writing to inform you that since I have not been refunded the cost of the repair work I arranged to be carried out at the address above, I am left with no choice but to deduct the money from my rent. I trust this will not cause a problem. 

Yours sincerely,

<Your name>
Contact telephone number: <your number>

IMPORTANT: This letter is the last in a series of four. ALL the letters must be sent if you wish to arrange repairs yourself and deduct the cost from your rent.