False tyre insurance adverti*****t

Hi
I went to DunDunlop Lakeside tyres here by Lambton to buy a tyre on the 21Mar24, so they didn't have stock and had to order it and it was delivered the 22nd. I sent someone to go sort it out as i was at work. Fine, the tyre was fitted and i was updated. I then asked to be assisted with registering the tyre insurance. The reception lady then says this tyre is not under insurance category, i was stunned as i chose Dunlop due to rhem having insurance. I then asked to cancel the transaction so i can aswell go to ither shops that had better dea of tyres. The lady agreed they can take the tyre out with a fee of R100. I agree that they can minus it from the money i had paid. After a minute i get another call from the lady advising that i will struggle to get my refund if i continue with reversing this transaction. I couldn't understand because we were not fighting, I'm reversing as i was under the impression I'll get tyre insurance and I'm not even blaming her for not telling me in the beginning as i had not asked. But she's explaining that she knows her boss and i will STRUGGLE to get my money back. It was stressed so hard that i felt bul**** into ending up continuing taking their tyre because i didn't want to struggle getting money back. So i just wanted to understand, is this how Dunlop do business by threatening a client into taking their business after being unsatisfied? I'm so bored because why does your advert also states there's insurance on all passenger tyres but mine is excluded?