You can get free, confidential help with this by contacting one of the organisations listed under Where to go for advice.
Some debts are more serious than others.
You will need to sort out your priorities for repayment and the largest debt is not necessarily the most serious. Rent or mortgage. If you get into arrears and don't do anything about it, you could be evicted from your home. Even if you abandon your home, you will still owe the money. Tell your landlord or mortgage lender as early as possible if you are having difficulty paying and they will help you to work out a payment plan Income tax.