Auto and general cancelled my policy after the payment was made

Am not impressed with auto and general at all, I pay my monthly premium insurance of my vehicle on the 1st of every month, this month of March 2022 my bank account was frozen and they couldn’t deduct my premium on the 1st of March 2022 but they sent me a massage stating that I have an option to pay my premium at any retail store. The following day on the 2nd of March 2022 I went to Shoprite to make a payment then After few days I called to confirm if they received the payment, and they did confirm. Today the 24th of March they just informed me that my policy has been cancelled due to non payment of March the app even states that my policy is inactive and the only way they could assist me is to restate my policy with them, meaning am starting my policy all over again,Which means that I was not covered for the whole of March and to be covered I have to pay a certain amount for the remaining days of March. If I had any problem during the month of March they were not going assist me since my insurance is cancelled, I don’t understand how can they cancel my policy for missing a payment with one day and after I made a payment the following day but still they decided to cancel, meaning that all the money that I paid for March premium went to down to drain.