Very poor service

An unauthorised online payment took money off of my credit card. I called Woolworths and was put on hold and the call cut. I withdrew the remaining funds the same day. The next day another unauthorized debit tried to deduct. I called Woolworths 5 times, I was transferred with no help. I was given a direct number for the ***** department with no assistance. I would like assistance with blocking my card and for forensics to do an investigation.