Over heating then trunoff

My a32 got issu that is not plug in charger whenever I insert chargering cable the battery logo showing bumping and then I go to the technician he fix the problem but then I face new problem over heating issue when I use mobile less then 5 mins I got overheating issues and then mobile automatically trunoff it's a huge headache for me please 🙏 someone help me to fix it the technician doesn't know anything i said that the problem in IC