Irrespective of how blameless you feel, you need to acknowledge that it was your actions that led to the impasse.
For example, if the customer has sent three or more letters over an issue, it might be best to pick up the phone to nip any rising customer frustration in the bud.
This thought-based method works wonderfully since it showcases that you invested some time in them.
Also, tips on writing sorry letters.
He graduated with a Hons.
I know how frustrating technical issues can be, and we regret that you had this experience.