I changed my car insurance from Auto and General and they cancelled my policy with immediate effect even though I requested it from 31 March, which means that my car was uninsured for the Month of March

I changed my car insurance from Auto and General and they cancelled my policy with immediate effect even though I requested it from 31 March, which means that my car was uninsured for the Month of March. My 1st for women was only to kick in on 1 April. Angel was able to update my policy to start with immediate effect as at today's date