Misrepresentation with Premium at inception to now

I took out insurance cover with Pocketsure effective 1st July this year. The premium that I was quoted was quoted R667.53 but offered a reduction of R256.94 making (for no claims lodged in past 5 years) the monthly premium R461.24. This month I was debited R1063.67 twice (3rd November and 25 November) with no warning on what the increase was for as the value of my car is still the same. I received no advise either by e-mail/sms or phone call advising on why there was a double debit and why there has been more than 50 % increase. When I called the office today, the officer advised me that this was an increase by Infiniti who I had no direct dealings with stating that because of the value of my car the premiums need to be increased. How is it that the increase of premium was effected six months later of taking this policy. I was lured into taking this policy with the promise of reduced premiums (no claims) etc. only to be debited more the 50 more and twice in one month???<br> <br> I have no confidence in this relationship with Pocketsure/Infiniti and I don't believe that it is ethical to increase premiums and debit customers without prior notification and acknowledgement of the increase.