misadvised about my motor maintenance plan

I called innovation last month to query when my policy expires and at what mileage as I was going to cancell the policy.i was advised that it expires in dec 2016 and at 999000km and was advised not to cancell the policy so I didn't. On 4 may 2015 the mechanic called to submit a claim and was told that the vehicle isn't covered as the mileage is 300000km. I then called innovation and was told the samething and then asked them y was I misadvised last month they said they don't know.asked to speak to managers but wer not available and would call me back.i called again on 5 may spoke to andrea who told me that on her system it says unlimited mileage but will look into it. And I told her listen to the conversation I had last month with the guy that advised me not to cancell the policy as I would be covered if anything had to happen and she said she will get back to me after speaking to managers and so on and didn't get back to me till today. I called again on 6 may andrea was busy and they said will call back.its the 8may and nobody has called me back regarding this matter. I have sent emails and no response. I was told all calls are recorded so I cannot get a reference no.