The company cannot trade whilst insolvent but at the same time they are under no obligation to appoint a liquidator. You as a creditor can do so by serving a demand for payment and then lodging a petition for liquidation, assuming there are sufficient realisable assets to cover the cost of the petition and the liquidator's costs. Happy to discuss further. I hope that helps. Please leave a positive rating so that I am credited for my time.
You can raise a small claim action or you can issue a demand letter followed by a liquidation petition. In both cases you should be as certain as you can that there are assets in the company otherwise you will be throwing good money after bad. You can raise a small claim yourself and the forms are on the Scottish Courts website at www.scotcourts.gov.uk. A liquidation petition would need the assistance of your solicitor.