2016 Tucson Infotainment TL-01 Update

Hi All, I am new to this forum. I recently got my car serviced by Hyundai service and they updated the infotainment system software but the buttons do the different functions, when connecting my phone the speaker is not working, etc. I asked them to check and they say there is a short in the unit which doesn't make sense as all functions are there but only not correctly mapped with respective button. Now, I am trying to download the software to be able to update it again. If anybody has the same issue and came up with a solution, I appreciate your feedback.