What did the Windows 8 upgrade advisor say about compatibility of the devices and the drivers?
If it didn't warn you about incompatibilities, I'd contact Acer again and complain. If, however, it did warn you and you decided to neglect that warnings, it's all your fault.
Since upgrading, most likely, makes the inbuilt restore-to-factory-conditions-from-the-recovery-partition inoperational (that's a definitely unpleasant feature of Microsofts handling of the boot sector), all you can do is go back to Windows 7 from using the recovery disks you made.
If you forgot to make them, you'll have to order them with Acer. Normally, they aren't free, but if you're SURE the Windows 8 upgrade advisor didn't warn you, you might be able to convince them to send them without costs. It might help if you download the upgrade advisor again and see what it says now about possible issues.
I have an Acer Z5763 All in One which is only 6 months old (TV, 3D etc) everything worked fine until I upgraded to windows 8 now the remote control and the 3D won't work, I have contacted Acer who say they cannot help and that the hardware does not support Windows 8, am I stuck with a machine that will not show 3D and with no working remote control, Anyone have an ideas what I can do ???