Acer A1-830 stuck in boot loop soft bricked..... topic

Okay i have an A1-830 & was installing a game, made a couple of modifications & now i have a soft bricked device.
I was installing Gangstar Rio & made some changes to try & get it to run as the minimum specs, my device had to run it but @ 1st it stated that the license was invalid so i changed the date backa year on advice from someone & it worked but then it stated that the device was incompatible, so i researched & found that was happening to most with devices that should have ran it but someone had advised to make some change to the 'batch.prop' file to fool the game to think it was a different device. I may have accidentally changed something in the batch file that caused this. i can't be certain but yeh, when i rebooted my tablet it got stuck @ the Acer logo in bootloop.
I tried recovery & did a factory reset & it acted like it was working but when i rebooted my device it still bootlooped. I then did some research & i tried to flash the stock rom but got errors each time i tried. i'll list the errors below;
i started off trying to flash the 'system.gz' file as follows;
>fastboot flash system Acer_AV052_A1-830_1.014.00_WW_GEN1.system.img.gz
> target reported max download size of 614470997 bytes
Invalid sparse file format at header magi
error: write sparse_skip_chunk: don't care size 202408408 is not a multiple of the block size 4096
sending sparse 'system' (600068 KB)
error: write sparse_skip_chunk: don't care size 202408408 is not a multiple of the block size 4096
error: write sparse_skip_chunk: don't care size 202408408 is not a multiple of the block size 4096
OKAY [ 68.091s]
writing 'system' . . .
FAILED (remote: flash_cmds error!)
>fastboot flash system Acer_AV052_A1-830_1.014.00_WW_GEN1.system.img
> target reported max download size of 614470997 bytes
Invalid sparse file format at header magi
sending sparse 'system' (585989 KB) . . .
OKAY [ 61.418s]
writing 'system' . . .
FAILED (remote: flash_cmds error!)

.................and these were the bootloader errors that appeared;
E: Unknown chunk type
failed: no such file or directory
E: flash system failed
FLASH FAILED!
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these are my build & region details too;
region: Australia (South East Asia)
build #: ' Acer_AV0K0_A1-830_1.007.00_WW_GEN1
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so that is where i am stuck @, i even made sure that i had the correct 'Java Development Tool Package' & 'Android Studio' was complete but everything else is out of my depth of knowledge. Any help will be 10 fold appreciated in advance...... :cool::good: