Sound system bluff, damn i'm mad

[best_I_one]

Italy here,
the only country that can compete with the states in audio customisizing, not in my case.
To make a long story short... I got this setup: Macron amplifier for all speakers, Sony amplifier for ADvent Subwoofer (don't remember size but it's half my trunk, croossover (not digital) and 2 tweaters.
I spent more than a $1200 for this setup and i wish i put the cash under the hood instead.
After a lame job installing the amplifiers and the sub I drive a week b4 the sub cone substituition, the installer puts a mono cone instead of the stereo cone that popped.
Now they install crossover and tweaters asking me $150 after all i already spent sayin' that now there's a new problem... plastic doors now vibrate excessivly since the last two modifications.
I reply with "what about my non stereo sub cone?" So I don't get charged on the crossover and tweaters.
The so called Pro said "next step to get better audio would be fiberglass door inserts as in competion cars.... but that would start around $10'000"
He he I'm goin' crazy over here.
4 sure I'll buy some good speakers in the states this summer, so plesa tip me if your happy with your system or link me to some troubleshooting page for my probs.
I'm a step from tankin' out everything selling it and doin' all over again, but my wallets bleeding to bad to do so.
Peace! and wave to those others Pts when they blink they're head lights!
Best_Italian_one

PT, pimpin' tinted and pumpin' soun system hehehe