I am sorry I must protest most strongly against the delay in delivering the above order. I have wired you three times already, but, although I have had three promises, I am still without the goods I ordered.
It is causing the greatest inconvenience, and I am losing trade through it every day. I must ask you to let me have the goods immediately or return my order.
I find it most unreasonable that your should treat an old customer of yours in this way.
Yours faithfully,