Westbank/Motorvantage dishonesty

Purchased a used bmw via westbank, got a call from motovantage on behalf of Westbank to extend the maintenance plan on the vehicle, the sales person advise thats its an additional 2 year cover and would cover 100 percent of the vehicle maintenance costs as an original bmw motorplan would cover, I then agreed as this would be added to my finance deal .

the policy document was then provided 2 weeks later which contradicted majority of what was said by the sales person regarding the cover being exactly the same as a bmw extended Motorplan cover .Ive tried to reach out numerous amount of times to get clarity on the cover from motovantage without success .

I then requested that this be taken of my vehicle finance deal right away as I was **** to by the sales person, it took 1 week for motorvantage to contact me stating that they put the cancellation through and that I should contact westbank to confirm that the amount has been refunded back to them, I then contacted Westbank to be told that the maintenance plan is active and no cancellation was put through .

Why would Westbank associate themselves with such a dishonest company ??

I want this policy cancelled immediately and a full refund made towards my finance deal