My battery started to die after I left the trunk open after getting like 4 jumps

What is your question?

My car won't start up at all my mechanic tried the engine start up spray from auto zone and that didn't even work I'm confused ....he thinks its the crankshaft system but I'm not sure when my dad was giving me a jump with his v8 truck it turned over and idled but still wouldn't start .....does any one no what the possible problem could be not interested in investing all that I have I have no idea how it turns over but won't start it just hesitates and stalls if anyone knows of this issues please let me no don't wanna waste any money