This is the very reason that our cars get knocked out so early. You must find a good human being with reasonable expertise and pay him reasonable to get the job done. Please note the process may take 3 to 4 hours (not including time to cool down, as you'll be driving to a workshop) depending on arrangements.
Did you thought why he refused to do your work? Because of free reasons: * to much time * relatively less money * above all he can't do few things or doesn't know how to do it. But very sad!
In which city you are?
Off topic: this shows in general that why we are lacking quality in general