A customer complained about a bad service. write an apology letter to him and tell him the store will reward him with the discount voucher. Posted on August 8, 2020 by Ambrose Words: 25Pages: 1Subject: EnglishTopics: apology, Assignment help, College essays, customer, Essayhelp, voucherA customer complained about a bad service. write an apology letter to him and tell him the store will reward him with the discount voucher.