Ridiculous price increaments

I signed for Oakhurst insurance in June for two of my cars and was really happy about the service, products and premiums. Suddently, this month, they withdraw more than R500 out of my account. I called to find out why this was so and what i got shocked me. I received such **** attitude from their staff, who wasnt even bothered about my call. She let me know that the premiums went up from the 1st of October, by more than R500 without even letting me know that this would be happening. Now, i am sure, i need to have approved to this increase before they debited my account. I am so disgusted by this and will not be continuing with them. If this is how they communicate such rediculous increaments and attend to customer complaints, then this is not an insurance for anyone. I had so much hope in this insurance, but after this, i am beyond livid and will be letting everyone i know about this terrible experience.