An IP can, if necessary, look at an Interim Order whilst preparing an IVA for you. I would not like to comment as to the advice you were given as there are many reasons why this may have been, and of course we know actually very little about the specifics, other than what has been posted here, but it is good, at least, that the interest and charges have been stopped.
As regards IVA, there is a case, for example, for starting at a lower figure and increasing that when the car HP finishes, but the devil is, of course, in the detail. There may be, or may have been, too much equity in the property to look at IVA, and you haven't mentioned the equity issue to go any further with that point.
Accordingly, you should take time to speak to at least 2 or 3 firms directly and specifically about an IVA and then go from there, so a visit to
www.iva.com looks in order.
Good luck and regards.