Hi Becky
You can only get out of an existing IVA if it is concluded or it fails and is then closed. If it fails, and your Supervisor chooses not to petition for your bankruptcy, then you can always put a DMP together.
Technically, there would be nothing to stop you proposing another IVA in the future, but you need to think about your credibility with the other creditors and whether your application would be taken seriously.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk