Help fixing Car

So I bought this car in July a 2001 TOyota Camry at a buy here pay here lot and it has issues I have so far replaced the tires and brakes within the first month of having the vehicle.  I had the vehicle two weeks when it overheated and determined needed a heating core and luckliy for me I was able to have the heater core bypassed until I was more stable financially to get a new one.

I purchased a new heater core at Auto Zone in Alexandria Va with a lifetime warranty and it was installed in South Carolina I drove my vehicle four days had heat and car was fine then on way home from work on day four my car had no heat and oveheated on the three mile trip home.. So the new heater core is leaking water everywhere in my car and I do not have the funds to get this removed and replaced the part is under warranty its just the labor I cannot afford.

I am required to have a vehicle for my job as I have to make deliveries and I cannot afford to not have my car and lose my job.  I have asked friends to help me with taking the car apart and removing the heater core and no one is helping me or they dont show up. I truly and trying to start my life over and get away from the bad things of the past but I cannot move forward with this set back. I need a hand up not a hand out and would appreciate any help anyone can offer to help me get my car repaired.  I know I cannot pay this back to anyone but I will do as I always do and pay it forward to someone else once I get on my feet again.