I had my student tier 4 application refused want to appeal

hi,
I received a letter from the ukba yesterday saying they refused to extend my leave to remain under tier 4 , they awarded me my 30 points from the visa letter, but didnt give me any points when it came to maintenance(funds), I needed 10 points. Reason being; my bank statements had excided their 28 days prior rule. This was only the case because they invalidated my application on the 11 of june, because they said I did not complete a mandatory section on the form..they gave me 28 days to submit a valid application and they also said they would highlight the section which they didn't, so I wrote to them asking them to high this section, They replied and so I completed the new form , and sent all my original document from the initial application as i was given i case number, I hoped this would finalise my application... I CAN NOT APPEAL.. they say this is because I put in an application after my leave to remain expired.. This wasn't the case at all, I applied on time ...need help !