Which as far as the central issue is concerned will ensure that future letters etc. will come to you, like a Letter of Claim and claim form.
But what does this mean?
The rental period began around 3rd August for a month or so
My driver's licence has my new address on it (Where I reside B)
However, I have not live at the property in which the letter has been addressed to for the last 18 months.
When you hire a vehicle you provide your licence which would have your address and this would be the hire company's correspondence address.
But yours wasn't.
What's the backstory here?
At present, your game plan is to ignore everything until a Letter of Claim and claim form and hope to win the day on the grounds that the keeper's liability cannot be passed to you because the hire company and creditor did not comply with PoFA requirements. It's common, but not a given.