Additional excess or Cancellation!!!

I recently got a quote from Iwyze for both my car and my husbands, I gave them all the information required as accurately as possible. my policy was finalized and i received a copy, upon receipt i noticed a few details were incorrect, so i called back and went through the details again, i was happy with the quote so i started my new policy with Iwyze on the 1st Aug 2017. on the 17th October, i get a call from Iwyze informing me that their underwriters want to increase my excess by a further R 3 000 per car due to my history of losses, i was surprised as my history of losses is detailed on my policy, can you now call me 2 months later and increase it??? and then threaten to cancel my insurance within 30 days if i don't accept it.

why was this not discussed when i signed up for my policy initially, is this how you catch people by giving them low rates then increasing their excesses afterwards? its ********* and absolutely unacceptable. nowhere on my policy does it state that Iwyze has the right to increase amounts or cancel policies. i have had comprehensive cover for over 10 years and i have never had this happen to me with any other insurer!! i will be laying a complaint with the ombudsmen, you cannot do as you wish to innocent people who just require insurance!!