Quoted one price, charged another

I was quoted a price by discovery which I signed and accepted. Without any warning, communication, my premium was increased by R200. I get billed a totally different amount to what was agreed and signed. Of course I must contact them to find out why, to which they said, my previous insurer disputed some of my facts, so they increased my premium. (of course they can't tell me what)<br> <br> How is this legal? How can you possible charge me a different premium without communicating it with me. Its a bait and switch. I wouldn't have moved insurance to you if you quoted me correctly. And if there is a dispute, COMMUNICATE with you customer. Then we can discuss, I can cancel and stay with my current insurer.<br> <br> Now I must cancel with you and reopen with my old insurer. Is this legal? Hidden away in your terms and conditions? Just a terrible experience with discovery insure.