The incorrect driving data have caused the significant increase of my next year's premium. 1. On 16/07/2022, Insurethebox sent me a letter saying Insurethebox would decline to provide a renewal offer. I was surprised by this decision because I have driven well in the last year and I have never made any claims since I got the license in 2019. I have realised there must be something wrong. Then I found the black box installed on my car last year has never worked properly. My account dashboard shows there are 0 driven miles in the last 11 months. Insurethebox has also admitted there have been errors in the black box. I have also found I can’t get reasonable insurance policy from other providers due to the faulty black box. 2. On 22/07/2022, Insurethebox provided a renewal offer £841.03, which is significantly higher than last year’s premium £625.21. I then contacted the customer service, and they even claimed the faulty black box worked in my favour and helped to reduce the premium. This is completely nonsense, as my renewal car insurance premium is significantly higher than last year. It is a common sense that the premium will be much cheaper when a driver has more driving history. Insurethebox claimed the bonus miles (which might be just a minor factor) helped to reduce the premium, but Insurethebox deliberately ignored the most important factor, driving history. As we all know, a new driver without any driving history will need to pay higher premium. My premium in 2021 was much cheaper (£300 less) than 2020 because there were driving data in 2020-2021. Now the premium is much higher, because there was no driving record in 2021-2022. I have also asked many of my friends, and their premium this year is similar to (or cheaper than) last year. Clearly, the unusual higher premium is caused by the faulty black box. Now I have to pay significantly more because of Insurethebox’s fault. I have contacted Insurethebox customer service and complaint team via email several times, but it appears Insurethebox people don’t want to rectify the mistake, nor solve the problem. I contacted customer service on 26/07/26 via live chat, and requested a callback. The staff of Insurethebox (called Lucy) promised that a senior manger would call me on the same day (26/07/2022), but this has never happened. I am really disappointed by the worst service. I have learned from Financial Ombudsman Service, Insurethebox should cover any increased cost because the black box has not worked properly. I will need to make a formal complaint to Financial Ombudsman Service if the issue is not properly resolved.