On [date] I [bought/placed an order for] a [item], and this was delivered to me on [date]. I have discovered that the [item] has the following damage: [add details].
The Sale of Goods Act 1979 makes it an implied term of the contract that goods I receive must be of satisfactory quality and for the reasons stated above they are not. As you are in breach of contract I am entitled to [a refund / have the item repaired/ have the item replaced] and I would request that you confirm by [dd/mm/yy] [set a reasonable deadline appropriate to the specific situation] that you will do this.
I also require you to confirm whether you will arrange for the [item] to be collected or that you wish me to return this and that you will reimburse me for the cost of returning the [item] and arranging adequate insurance.
I look forward to hearing from you.
Yours sincerely