Paying a minimum payment is certainly better than doing nothing and leaving the problem to escalate. If the minimum payment you can afford is higher than the minimum payment required by the catalogue company you will see your debts reduce, albeit slowly.
Paying just the minimum payment however, can result in significant interest rates and you might not see your debts reduce this way. It also means you’re at risk of your account being in ‘persistent debt.’
If you have been informed you are in persistent debt, this will mean that you have been paying more interest than you have paid back for your credit.
You can read more about persistent debt here!