Just passed my test but I can't get insured on my own Motobility car

Hi everyone, thanks for reading. I'm looking for some advice. I have a Motability car and I had a driver to only have in my provisional license. I've now passed my driving test and I cannot get insured on my own Motability car due to a LC20 conviction which was driving in a car in another vehicle now passied and done it I know  everything I should've done before. However live suffer in the way I suffer with extreme pain due to osteoporosis and the only reason I drove before was because the pain was too much wrong I know in the eyes of the law but the pain I can't explain I'm a single mum I needed to shop i wasn't driving recklessly I was stopped because I told social services I had a provisional only expecting some help instead I got stopped now I'm not allowed to be insured 😔