Unfairly treated by misleading advert..

I did a short term insurance quote with Outsurance about a week ago and unfortunately they could not match my premium with my current Insurance. They are currently running a promotion whereby an award of R500 or R1500 will be awarded to the individual if Outsurance is unable to match or better your current insurance premium. When I requested for the benefit of the award of R1500 which is what I qualified for , I was politely told that it's not for business quotes..just to mention my vehicle is used for business purposes. I was flabbergasted as nowhere does your advert specify it's for personal cover only. This is grossly unfair and unjust as I believe that I was misled by your advert.... and based on this I should be awarded the bonus of R1500 as a good gesture...should I bring this to the attention of the Advertising Board. Awaiting your response