Samsung S3 GT-I9300 stucklogo and volume button broken

I got a big problem right now cause my samsung got stock on boot logo and cant boot the recovery mode neither download mode. It happens after I used my bulge battery i got two batteries and i use it simultaneously but other battery run dry so i use this bulge one cause it still works but when its goes low my screen got flicker and got hang, but this time after i restart my phone it stuck. I cant even try to hard reset cause its volume buttons are broken and cant perform recovery. So its like slightly hard brick and what should i do? Can i still boot in download mode in other way without using volume keys? I tried to bring this to technician but they cant fix the vol button cause they dont have any stock.

Thanks in advance for helping..

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