bad service delivery

i am very disappointed in the service i received from telkom had a appointment for line installation on yesterday and they never showed up toeke a day of from work because they told me it is a all day appointment between 8 to 4 and they never showed up very disappoint "Openserve: Dear client MR. ANDRIES FRANCIOS SWART, Openserve on behalf of your Service Provider will send a representative to your premises - 36 FIFTH ST, DELMAS, DELMAS to fulfill your service request. We have scheduled your new line installation/modification for the 2017/10/30 - please note this is a/an All day appointment. Please ensure that you have your original ID document and/or letterhead and a certified photocopy thereof ready for presentation when the technician calls at your premises. Please reply @Yes if all the above mentioned is correct or @No if the above mentioned is incorrect and/or date"