nopes you never got screen changed, so clearly you have no idea how it works. who gives you car after 4 hours when changing screens. and car does not matter, all have to be glued with silicon, so pretty much sums up the process.
they will keep the vehicle for a day or 2. depending upon weather condition. for summer i think they should give you after 1 day. this is because of silicon to settle. Give them time and you will not repent on it. Dont drive after very short time, let the silicon dry and adjust itself.
they will tap the screens to avoid any damage due to potholes. so be careful even after 1 day for next 2-3 days.