Uhuru Financial Services and old matual insure not treating me fairly due to delay to finalize after receiving agreement letter stating that they will pay

I received a call from uhuru broker to offer me car insurance, at the time I was using another insurance so after they convinced me, I did change my mind to take they offer of Old Mutual Insure. Now I'm doing a claim with old Mutual insure and this company is not treating me fairly but the uhuru claims department promise that they will help regarding this matter but still now no change, this uhuru broker convinced me to this bad car insurance which is ranking at number 65...and now I'm experiencing hard time to claim. The old matual insure give me an agreement letter stating that they will pay the total loss of my car, after one week later I received a call from Peter Anderson old matual insure investigator saying he will be doing the investigation regarding my claim, he came and do investigation. Peter Anderson send back the report to Petric NTSHANGASE on old matual claims department. I did call uhuru claims department for help, at uhuru claims department by the Name of Mrs Stephen offers to help me. She promised to help me and did contact Mr NTSHANGASE from Old Mutual Insure, Mr NTSHANGASE said he received a report from Peter Anderson which state that the claim must be rejected based on misrepresentation, misdescription and non disclosure which is not correct true, even Mr NTSHANGASE does not want to write rejection letter because the information provided by Mr Peter Anderson from Old Mutual Insure Investigator is not clear, he said I was using a car for business purposes while my policy is for business use, he said I did not state that my brother will be using a car while my policy state that my regular driver is my brother, so this report is not correct clear to me. This two companies are not treating me fairly as customer. Please help me to resolve this issue.