I have placed many orders with this company, they ...

I have placed many orders with this company, they have decided to cancel because they didn't charge shipping and decided to start charging after placing the new orders, should i really consider them reliable after charging my CC? after going back and forth for weeks i still keep getting pushed around. my customers are waiting for the items but they have decided to not make it work. still working now on disputing all the CC charges they charged without shipping the actual order. what a headache