O+ 8.37z Stock firmware

does any of you here have a stock firmware of O+ 8.37z or at least knows where I can find one? I can't find one anywhere. a phone repair shop found one at gsm sandwich but I do not have access on that site. I don't know what to do. I really need one to fix my phone. I don't have money to get it fixed or find a new one It has got a Trojan virus and some important system apps have been deleted. now my phone cannot install/uninstall apks, it cannot read sim cards, cannot open messages, default keyboard missing, Bluetooth missing. I cannot fix it. Please help. :(

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