Op, did the creditors accept the £1 token payments and the £5 ones?
Did they accept to stop interest charges and fees?
If so stick with that.
That means you have already defaulted on the debts. What paperwork have you recieved.
If so, you can carry on paying the agreed amount and the token payments. Every 6 months the creditors will contact you to see if your situation has changed and to see if you can offer more. You do not have to agree to increase payments but they will always suggest. You may have to fill in income and expenditure forms.
This can go on for years/decades. The debt may be repackaged and change hands and you can make settlement offers and they may also offer settlement offers.
But first check if it has been defaulted on and that all interest and fees have stop being added.
Lots of info online and on money saving expert.
With regard to the new credit card, pay it off ASAP. You cannot build your credit rating right now and there is no point to doing so.
Iva and dmp can be expensive, often defaulting and discussing with creditors is the best way. It sounds like you have already defaulted, so please check out your current situation properly. You need to know what exactly is going on with each and every debt.