The receiver handling the company's bankruptcy has a legal obligation to ensure that the maximum possible percentage of debt is paid back to the company's creditors. To ensure that this happens, he is obliged to call in all debts owed to the company and, where necessary, to pursue such debts through the courts.
So, if you owe money to a bankrupt company (and fail to pay it to the receiver), you can expect the receiver to take you to court.
If part of the reason they went bankrupt fwas people not paying money owned to them then it makes sense for the receiver to be able to try and recover that money.