Not able to uninstall functional pack !!

Hi -
I am trying to uninstall one of the service pack - but it is not letting me do so. Giving below exception.
I am not sure why it is saying that payment is pending - when deduction was made on 1st Aug itself for this month.
Request to please confirm urgently.
Thanks.
http://support.backendless.com/public/attachments/1ca64320944fb73f5d0bde34c763040f.png</img>

Please ignore this - I got the solution from one of the answer in support forum. I have to uninstall the event handlers first. Thanks.