Iva company gone into administration and won't complete my iva 10 years later!

I took out an iva with my ex partner 10 years ago. His debt was much more than mine and when we split 6 years ago I phoned them to have mine separate and I was told that mine could be completed because my debt was very small and we had made enough payments to cover it. Roll on 6 years and many phone calls as to why I haven't received my completion and my credit score is still horrific and I'm told the company is in administration so cannot complete any Iva's! My ex has even finished paying his 4 years ago and his won't be completed either. I really want to get a mortgage soon and I won't be able to if it's not completed! We went into this on the basis that I'm 5 years we would be debt free and 10 years down the line they are still writing to me asking for income and expenditure updates for an iva that was finished years ago! Is there anyone I can get in contact with to make them push this through as I fear it going to just be stuck in it forever! I'm 35 and want to buy my house! The company are Varden Nutall.
Many thanks.