DStv poor customer service

I subscribe to receive the DSTV ultra decoder and after agreeing to the terms of agreement, agreeing to debit orders etc DStv has not returned to install. I received 3 sms’s 9pm Sunday evening of the 15 May 2022:

“DStv: JS & MS Rampai is en route to and will be arriving shortly. Please ask your installer for the claim number before granting entry: P4Q9MC”

Immediately after:

“DStv: Our installer is due to arrive shortly. Please ask them to verify the claim number before granting access.”

Then:

“DStv: Unfortunately the installer was unable to perform your installation as per the agreed date and time. We will contact you to reschedule shortly.”

….All in the same minute. I’ve called call centre’s, tried their sms line and still I am struggling to get through. I fear they charging me without installing and if that were or were not the case, I can’t reach DSTV to find out. Poor service