Documents seen by the Enquirer reveal the scale of the companies debts with 469 unsecured creditors chasing cash.
But some creditors fear the final bill will be even higher.
One said: “The administrators only had us listed for half what we are owed and didn’t know about later applications for payment we issued and had certified.”
The documents also reveal the turmoil at the company in the run-up to its demise as previous management were blamed for burdening the company with “excessive overheads and fees” and taking on loss making contracts to obtain “high turnover levels and cash flow”.
HOC grew rapidly from a £4m business in 2010 to £76m in 2015.
Latest accounts for the year to March 31 2016 show a turnover of £86.6m but the company made a pre-tax loss of £11.16m.
A creditors meeting will be held next week.
One firm owed money said: “The whole thing has been a total shambles for a while now.
“I just feel sorry for everyone owed money by this lot.”
The assets of HOC were sold in a pre-pack deal to a company called Coppercast Group Ltd for £50,000.