Bad service - nobody takes ownership to emails

I entered into a car hire agreement 8 months ago During that period I was involved in a car hit from behind but the driver admitted guilt and their insurance settled the claim. However, Budget-Avis requested me to pay an additional amount at the onset, as a third party insurance cover, until the claim was settled. The claim has now been settled, but AVIS has not reimbursed me with the full amount paid. There is also another unresolved issue. I was issued with two traffic fines of which AVIS claimed admin fees higher than the actual fines. Although these fines were paid immediatly to AVIS and proof of payments and receipts received. It seems AVIS South Africa have not cleared the fines with the Traffic Department. So, I keep on receiving numerous emails from the Traffic department to settle the fines. Their service is jus so bad they dont even repond to my numerous emails despite even addressing management.