From your statements I think you have too much of expectations.
I think you should not expect callbacks in a short timeframe like that, especially not when you got an answer in e-mail.
You should understand that these companies are busy fullfilling orders.
My experience (not specifically with this company but in general) is that you will mostly get an answer to your e-mails within a shorter timeframe because writting and sending a simple e-mail is less time consuming than calling.
You did not tell the most important thing though is how much time did expire since your order?
Did they hold your order for weeks? Or one day or 2 days? It would be good to know when you write a harsh statement like you did.
Try to get stuff from e-bay and you will learn what real waiting and lack of communication is.
It's surprising to me that you want to contact Paypal when they told you they will send parts tomorrow.
Why not contact them for a refund if you don't want the parts anymore? With the most respect, but this makes me feel like you really must have bad communication skills.