Failure to show for booking

We placed an order this month for Telkom to install a fixed line (with ADSL) at our home address. We received an sms to say that they will come on the 15th October and that we need to reply with 'yes' if it is confirmed, which we did. It is an all day booking which means we have to sit at home all day - no one pitched. We escalated the matter with Telkom online, a new date was set for 26th October. Again, we waited all day at home and no one came. This is a disgrace. We need to work and your technicians cannot honour the booking times. Both chat consultants online that I have spoken to said that no comment was left on our profile so they don't know why a technician didn't arrive.