I own an automotive repair shop and did several ra...

I own an automotive repair shop and did several radio ad campaigns with a local radio station. New World Marketing was who did the billing and ads. Every time I did an ad campaign I paid, by check, the three installments. Well, come to find out they used my account information from my checks to go ahead and EFT funds from my bank account multiple times over the course of a year without my permission to the tune of $903.90. I have contacted them several times about this and they even admitted wrong doing but couldn't explain why it happened. I have been told several times that a refund check will be issued but I have yet to receive anything. This has been going on for at least six months now. This company has illegally stolen money from my business and continually lies to me in the hopes that I'll go away. I highly advise anyone to NOT do business with this fraudulent company.