Classic Parade review: Failed car hire and #CP-9408

Had hired a Nissan GTR for a Saturday starting at 12:00am. Waited till 03:00 and after about 10 calls with the number +[protected] (which is absolutely useless) where they said we'll call you back (never did) or we'll escalate it I gave up and went to bed. I woke up to no messages or calls at all. The one email the company has, [protected]@classicparade.co.uk, which belongs to an Andrew Brown seems to be the only way of contacting or communicating with this company as the customer service team on that number don't seem to have a clue on anything that is going on - all they asked for was my name but didn't seem to have any tracking or useful information on car delivery. Anyway, Mr 'Brown' finally responds at around 12pm the next day and says sorry but the engine management light came on last night - which is odd as I've seen a few reviews that have said the same thing happened to them but there's no pictures or evidence and they were happy to keep me waiting for 3 hours. Make of that what you will but I didn't care at that point and just wanted a refund which is what Andrew said would be done first thing Monday morning and he would compensate me by offering me a free day of car hire in the future - how exciting! Shocker but it wasn't done on Monday morning and it's now Thursday at the time of this complaint. I held off on writing this complaint but enough is enough I want my £2450 back - Andrew was very responsive when it came to paying the invoice and booking the car but now it's time to pay me back he's suddenly quiet. There's a lot of red flags about this company and it is not well run with a great lack of professionalism that I wish I'd seen before using this company (e.g. company address of 1 Knightsbridge Grn, London SW1X 7QA but not registered on companies house, one email with no indication of any teams, 100s of bot reviews with only one review, negative reviews all reporting similar things, no internet footprint of this Andrew Brown character etc.)