I can't turn on my phone. Why?

Hi I buy galaxy j5 at 2015 and worked fine till the battery got swollen around second month in 2018. The phone was discharging very fast and charging very slow and once when it get discharged won't turn on when i let it to charge. So I thought it was bad battery so I buy new one but still it won't turn on even the charging animation when turned off. So I was searching how to unbrick hard bricked phone and I found is jig So I order one from aliexpress but it didn't have the fifth contact I think so it didn't work so I buyed new one and I found old galaxy mini so I tried is jig on this phone and the new usb jig worked but for j5 didn't. I really don't know what to do now I'll be happy for every suggestion. Thanks Dalibor. Ps:sorry for mistakes I'm Czech.