Hello, I am a solicitor with 20 years experience. I will try to help you with this.
You should attend court and explain that in fact you did respond. You are not guilty plead not guilty (be aware of higher sentence of convicted rather than plead guilty and costs orders). The case will be adjourned for trial. You should get a solicitor for that (typical costs £500. + VAT) to increase your chances of acquittal.
What can you adise me to do with regard to my situation?
I think your question must have crossed with my answer.
Is there anything else I can help you whht?