Poor Service from Oakhurst Insurance

My car was involved in an accident on the 9th of December 2018. I called my insurance company (Oakhurst Insurance) after the accident and they sent the car to Letaba Penalbeater which is not approved by Mercedes Benz. A quotation was made and settled with non approved parts which I refused to accept. The car was sent to Trans Letaba penalbeaters(15 January 2019) which is approved by Mercedenz Benz however Oakhurst Insurance is taking forever to assess the car. It is also difficult to find help. Oakhurst Insurance is forever refering me to Zukisani the person responsibly for claims but he is hard to find. When I call Oakhurst Insurnce they always promise to callback but no one calls. Oakhurst Insurance is a ****. I would not advise anyone to insure their belongs with Oakhurst insurance. I feel very frastrated with their poor service. Please help.