怎樣在電話上用英文說呢,請各位幫幫我.

tell the truth, don't tell liar
you : Hello, may I speak to Mr/Miss xxxx (your client)
your client: yes, speaking
you: I am xxx (yr name) and calling from xxx company. Sorry that I forgot the appointment with you yesterday. In order to compensate my fault, I am willing to delivery the xxx (the name of things) to you. I hope that you could accept my apology.

Hello, this is (你個名) from (你個公司名), I am apologize for your inconvenience, you told me that you will pick up at 6pm, but we off at 5 minutes earlier. We forgot to wait you, please accept our apologize.

Sorry sir/madam, we've gonna be closed at 6pm sharp every working day. However, if you could leave me your address, we'll send your stuff on this occassion.