Kia Silverton is a disappointment

Took my car for a service at Kia motors silverton on Friday the 31 Jan 2020, at some point when they were servicing the car I received a notification that the battery was disconnected, but didn't pay attention then as I assumed that was part of the service. The following day the car didn't want to start, we had to jump start the it before use. We sent a message to the service advisor about the problem but they didn't respond so we took the car back to them and they told us they can't assist us which is strange because the car didn't have any battery issues before the service then afterwards it's starts acting up. The worst part is that they didn't even want to check what might be the problem. Very disappointing, they could have handled the matter better because we trusted them as the manufacturer of the car but instead they created a mess. Tried to also call the kia SA customer care line and they said they'll get back to me but they never did. It's a shame!!!