Dear Sirs:
We are sorry to learn from your fax of 30 May that you find our printed shirting supplied to your order of 10 May not up to the sample
From what you say it seems possible that some mistake has been made in the dispatch of the materials meant for you. And we are arranging for our representative in Paris to call on you within next week to examine the faulty materials.
If the quality of the materials delivered is found inferior to that of the sample, you can rely on us to replace the unsold part of the batch, and we shall do everything we can to ensure that such a mistake does not happen again.
Yours faithfully,