Rip-off price at Hyundai Pinetown.

I am very disappointed with the service at Hyundai Pinetown. I took my car for a hard starting problem. They did not communicate with me trough the WhatsApp that they use and the price that was given to me for changing 4 spark plugs , plug leads and crank sensor came to R12580. This is laughable and ridiculous. To change a crank sensor is only 20minutes.