How strange that you have only been in an IVA for a few months, yet your mortgage is increasing so sharply so soon in. Surely your IP was made aware of this and provision ought to have been built in to accomdate this. How did you feel you were going to be able to make the payments?
With regard to the 4th year provision, you need to check the wording of your IVA to see what provision there is for affordability. These days it is normally limited to 60% of your disposable income, and if there is no equity then there is nothing to rais.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp