FNB Life Insurance ****

I took a life insurance with FNB in August 2020 for R269 per month and upon the first anniversary August 2021 my monthly premium increased from R269 to R991. FNB is taking me from pillar to post with no explanation of how a premium can increase from R269 to R991. I need to cancel this policy, I cant even cancel it as no once can assist. Pathetic