Absa idirect policy cancellation

Had a claim for my car now Absa I-Direct wants to cancel my policy. Initially was served with a letter for a cancellation noting that I did not declare my previous claims with Zurich. When I complained that I declared my previous claims with Zurich and was proved they lodged another reason to say I am a risk the policy should not have been approved in the first place. That should have been picked up and I could not have taken it. So now the cancellation will have a bad impact on me to get an insurer because they should not have insured me in the first pace. The policy must stand or a repayment of 18months premiums or this becomes an unfair practice as they are involved in RISK BUSINESS