Service lady giving me attitude

I took my IX 35 to Hyundai in Sandton on Friday since it had a radio problem, they took the radio and told me that my radio should be back on Monday or the latest on Tuesday. On Tuesday I couldn't call since Mtn has a network problem. On Wednesday I decided to ask them to call me via Facebook. A lady by the name Michele calls & tells me if I'm lucky I'll get my radio on Friday. Asked her why didn't they've the decency to call me on Tuesday to let me know that there's going to be a delay, also told her that it is just poor service on their side since they should keep clients informed at all times, and she just went hmmmmm on me like she doesn't care. It's very disappointing to be serviced by people that don't care about their clients. I'll never take my car to Hyundai Sandton again