Bad bad service

I am very disappointed with woolworths. I made an online purchase on the 16 of December and paid with my debit card. Only to find out that, they have charged me twice for one purchase. They charged me on the date I made the purchase on the 16 of December and they charged me again for the same purchase on the 21st of December. I have been trying to call them and you hold for more than 10 minutes without any help. This has been a nightmare in so many ways. Firstly my order didn't arrive on the date it was suppose to, secondly when I opened it it was not sealed and thirdly this being billed twice for one purchase. I have sent them an email with regards to this and I haven't received a response to date