Hi
The banks and other organisations can appear to make debt worse by applying this sort of punishment in the form of fees or charges.
I think you need to do the following.
1) Do a full budget of your expenses and look into any savings that you could make. And I mean every item on the list including food, transport, gas & electricity, Insurances etc. Budget advice see http://www.cccs.co.uk/budget/budget.aspx
2) Write down all the direct debts in the date order that they are due to come out. Is it possible for companies to change the date direct debits are debited from your account? Can they change the DD dates to nearer the date that you get paid? If you got paid on say the 1st of the month, it would be better for most of the DD's to come out as early in the month as possible. It might not leave much to pay for you to live on for the rest of the month, but atleast you would know what you have left and will not incur the fees/charges.
3) If your budget is trimmed to the bone and your reasonable expenditure is more than your earnings, I would suggest that you go back to the debt management company, to review the current repayment plan. If the debt managers are in agreement with you, they should be willing to write to creditors to negotiate revised payments.
In regard to 2) you will find than most companies are flexible on DD dates these days. Amend the ones you can and for others, just make sure you keep enough money in the account to service these.
Hope this helps.
Huckster