1999 Jeep Cherokee Classic Overheating and Coolant Nightmare

1999 Jeep Cherokee XJ So what I did is I bought a $30 head gasket repair kit basically it additive out throw it in now with that date is it stop darling he overheated like three times. Also we have used two things JB Weld high temperature partially got the freeze plug fixed. Now we were still leaking we're still overheating or still running rough, so I have done a complete coolant system flush. I have also added a oil change, block sealer and also am installing a trans cooler.