Changing Address didn't change and my appointment was missed? But my internet was delivered and is w

I just moved, but the address of my account hasn't changed because it says I missed the appointment. But I didn't miss the appointment because my internet was delivered and is functioning properly. I don't want to make another appointment to change my address because that will send another technician and waste their time.
So now I don't know how to change my address. Does anyone know how I can change my address without making a new appointment?

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