Disgusted with the service - Innovation Group

My engine on my Suzuki Swift seized . I did not worry too much as I have a warranty cover with Innovation Group. I knew I was covered. I contacted Innovation Group and logged a claim. They declined my my claim saying that that the service was not done. I was and currently unemployed and a pensioner and could not afford to take my vehicle to Suzuki. I did the service myself and provided the invoices for the items purchased for the service as they requested. It as been a month of being given the run around. I phoned in and requsted to speak to the manager and as usual the manager is not available. I left a message for Thamsanqa Maseko to call me. He called me and advied he will call in 2 days time with the the outcome. He gets the agent Mahlatse to call me and when I requested to speak to the manager. He refused to transfer me. I then asked to give me the email address of Thamsanqa's manager. He refused to give me the email address. Mahlatse then rudely cuts the call. This is totally unacceptable for a large company to treat their customers.