Refund on cancelled vehicle insurance

I cancelled my vehicle insurance early February 2023 and was informed of a refund that is due to me and has been outstanding till to date and all attempts to follow up on this matter has failed as no valid response has been provided. I am not pleased at this stage as I know very well that if I was in a position to not have paid the company, my services would be cancelled 😞 please assist urgently as I feel ****** of what is actually due to me at this point.