terribly dissatisfied former client of old mutual

I am now convinced that this company is a *****. I called early this month to indicate that i will be trading in the car i had insured with them for another. I could not get a better premium that I am satisfied with from them, hence i went to another company. I was then told that i needed to provide them with proof of the car that has been traded in. i comp**** because I wanted part of the premium since i was paying a premium with this new company. still, no acknowledgement from them after having forwarded the proof of the trade-in. This is my policy number ***