You are. You need to maintain sufficient balances to cover fixed expenses. Things like rent, utilities, insurance, etc. have to be accounted for with cash before variable expenses like food, car repairs, entertainment. Whether or not the agent was a poor communicator is immaterial to owing the money for the premium. If you expected to be covered by the insurance, you are liable for the premium for that coverage on the date that it’s due. The fact that the money was not in the account is not the problem of the insurance company.