Our IVA finished November 2011 and we still havent recieved our certificate to say we have finished it the company that are dealing with it say they are chasing PPI on all the accounts but reasonably how long does this take

We have been in an IVA for 12mths we had outstanding debts of £90,000 and are currently paying 29p per £ as part of our agreement there was no equity release clause after 4 years at the end of our 4yrs can they insist that a modification be added to include this