Hi the same thing happened to me today. Are you thinking about appealing or just try your luck again?
Appealing this kind of refusal is usually futile. The onus is on the applicant to submit a complete application - if you didn't do that, your file was rightly rejected and there are no grounds to reopen the case. You can try emailing asking them to reconsider and reopen, but don't expect to be successful. You should assume that you will have to do the whole thing again.