FNB debit card purchase dispute - FNB SERVICE APPALLING

I have a purchase dispute, the money was deducted twice. I sent this query to the disputes department with a completed form and copy of the purchase slip from Makro. Let me say your service is appalling, I have been to the Northgate branch and they sent me straight to the phone. On the phone I'm being transferred from pillar to post. Someone please get back to me! I need this account sorted I need to use it urgently!