Bad management

I am so disappointed that I have been struggling with my vital drive cash back for the past two months. Every month since july I gave had to scan in slip because the swipes at the petrol stay does not pick up. In August the decided to run the cash back earlier and to my suprise I only got back half of what I was suppose to get, I called in and was advised that the difference which is R455 will be paid with the september run with my new vital cash back. Today I sit with the correct amount on my account for the month of august rewards but where is my july rewards. Do you rob and inconvenience your clients for your own benefit? I have many different products with you and this is the worst service I have received this far. I called last week to confirm that payment would be made this week of july balance that you owe me and august and to my disappointment you have failed me once again. I want this rectified immediately because if this is how handle your clients then I will take my business elsewhere.