For future reference (or for others..): If you really can't pay in the UK, set out your expenses and income clearly in a letter, demonstrating that you've taken reasonable step to limit your spending, address it to all your creditors, and ask for interest to be frozen and offer what you believe you can afford (proportional to debt) to pay to each creditor on weekly or monthly basis. If they refuse, then pursue a debt management plan.

Most creditors in the UK will play hardball if you talk to first line staff, but will act more reasonable if you demonstrate that you have done your homework in determining what you can actually afford to pay, partly as that implies that you likely is also aware of alternatives like a debt management plan or IVA (Individual Voluntary Arrangement), or ultimately bankruptcy, which may leave them without full repayment.