Appointment for Saturday for TV Installation

Hello,

My name is Mary W. King.  I have an appointment on Saturday for TV installation, but I am unable to be here.  I have to work again.

I need to change my appointment (I can only do it on a Saturday) from February 27th to Saturday, April 4th. 

Please let me know if you can help me with this, or if there is a phone number I should call.

Thank you,

Mary King