Late/Tardy responses and Failure to deliver

On the 22nd of May 2015 I was called by On Air TV and advised that I had to upgrade my DSTV package to EXPLORA as they would no longer support my older decoder. I accepted and had to wait a week (29 May)for delivery of the decoder and accessories!. I called On TV's call centre (29 May) and to ask for an installer to be allocated to me. I had to phone the call centre on Monday (01 Jun) to request these details. I contacted the allocated installer and was advised that they could come in on Thursday 04 Jun, this is too long a delay for me.<br> Note that they offered to come in on Tuesday 03 Jun however they could not make it.<br> I have lost faith in your ability to deliver - this order should have been finalised (installed) within a week of the 22 May. I was on leave until Tuesday and it will be difficult for me to get time off to let the installer into my flat, for the rest of the week. Note that On TV offered me a product they should have had all their players ready to deliver this installation / upgrade in the shortest possible time i.e 5 working days