Unpaid consent order

Hello, My ex and I agreed on the financial arrangements and the judge issued a Consent Order with 8% interest if payment was late. He should have given me a lump sum on 31.05.21. However at the last minute he filed a D11 asking for either, time to pay, pay in instalments or have the consent order squashed. The Judge explained that he had filed the wrong form, i did however say I would accept instalments, but ex wanted to pay a pathetic amount each month. So Judge said he needed to provide proof of current income etc. Which he partially did, however at the recent hearing the ex changed the game and said his now homeless, jobless and has just split with his partner and owes her lots of money. Judge explained that the consent order with me is still in force and he could not help him, as he didn’t apply to have the consent order set aside.
My question is should I complete a form to enforce the order, if so what form should that be? And the amount I’m claiming should i include the interest to date? And should i apply for further interest or would that automatically be applied as the original court order states 8% interest if lump sum not paid.
Thank you for any advice given
regards
Debbie