How did you find out about it, when did you find out about it and what do you want to do about it??
The court will allow you to pay a judgment in instalments. The amount will be fixed by the court so the fact the solicitor on the other side thinks it is not enough is pretty irrelevant but you will need to attend court. Take proof of income and outgoings with you as far as is possible
The Protection from Eviction Act carries very heavy penalties. I am not surprised by the amount of the financial judgment.