I hate Cigna!

I need to vent! A month ago I submitted a LOA for work through Cigna (our employer goes through Cigna). They gave me the leave ID # and sent me the paperwork to give to my dr to fill out and send back in. The paperwork had the same ID # as they gave me over the phone. My doctor filled out the forms and faxed them to Cigna twice, just to make sure they got them.  I called a few days later to make sure they received them and they hadn't. They asked for my doctor to fax them again. This went on for the next 3 weeks.  My doctor faxed them 6 times and emailed them 3 times. They claimed to never get them. Then my employer told me yesterday that it had been denied because I never sent in the paperwork. I called Cigna today and they told me the leave ID # I had was incorrect. Instead, they had a different # altogether and that's why they never received the paperwork. Now the leave is closed and everything denied because I supposedly never responded with the paperwork.  I'm so mad. I called them 5 times in the last month to see if they had the paperwork. Did they bother to tell me they gave me the wrong ID #? Why hell no! Now they are saying to resubmit with the proper leave ID #, but they denied the leave and closed the account so who's to say that this will even work. They look for ways to deny leave and they really got me good.  I don't know what else to do other than resubmit and call back. Wish me luck.