Charged double and no sign of a refund.

I placed an online order which was delivered in 2 batches. My credit card was debited with both the order as well as the 2 deliveries. According to the bank all the funds was paid over to Woolworths. After numerous calls, Woolworths insist that they can either not hear me, drop the phone, or twice that they didn't receive the funds. Also apart from an automatic response to my email no further communication. My bank statement don't lie. Be aware these people will not refund you when they double charge you!