Extremely poor customer service from mixtelematics africa

I wish I could not even give a star for the worst service I received at Mix telematics offices. I have visited offices 2 times trying to resolve a small problem, I have even called over 30 times with no luck. On Friday November 3rd I was at their waterfall offices in Midrand to make a follow up on a refund and I was assisted by Lethabo who requested assistance from a person in the accounts department named Bulelwa (who created the credit note) to provide feedback on the refund that has been pending approval for almost a month now.She refused to come as she said it was late yet the office was still open .I really do not know what it will take to get descent service , as not results are coming via calls know physical visit to the office .all emails I have sent through have neither yielded any service , requesting to speak to superiors have never yielded results.