Dear Sir/Madam,

I am writing to express my dissatisfaction with the recent order of running shoes I placed on your website. To my surprise, the delivered shoes were of a different size and colour than the ones I had ordered. This has caused me great inconvenience and dissatisfaction, especially since I had already paid in full for the shoes I had chosen.

Moreover, I urgently need the correct pair of running shoes for an upcoming competition, and the incorrect pair that was sent to me has put me in a difficult position. I had anticipated that the shoes would be delivered on the date promised. Nonetheless, I am now left without the correct shoes and without any indication of when I will receive them.

Consequently, I'd like to request that you take immediate action to resolve this matter. I need the correct pair of shoes delivered as soon as possible, preferably before the event. In addition, I would like to be compensated for the inconvenience caused by your error.

I hope that you will take this issue seriously and act immediately to resolve it. I eagerly await your response regarding the steps you will take to rectify the situation.

Thank you for your consideration of this issue.

Sincerely,

ABC