Telkom - taking customers for granted

In January 2018, I visited Telkom in Middelburg to request for telephone installation. They gave the 12th of Feb as they the day of installation and even sent me an sms confirmation with the order number. However they didn't pitch nor bother to send an apology or a new date of installation. I had to call them for them to reschedule and they gave a new date of the 22nd of Feb, of which they also didn't pitch nor apologies as before. I still had to call them again and they rescheduled to the 9th. What I don't understand is that they are the ones that give these dates but they end up not honoring them when I have moved my schedule around to accommodate them. Appalling service from Telkom. I doubt they will even make it on the 9th