Hi Snuffy,
Sorry to hear of your bad experience with A1 Travel. Unfortunately I have not had any experiences with the customer service team at A1 travel so I cannot offer any advice in that regard; however, there are a few routes you can take with this. From the details you have provided I would say you have a very good case for claiming a full or partial refund as compensation for a mis-sold/mis-represented holiday.
1) Send an email to the customer service team outlining your complaint including all relevant details. Include how you would like the complaint to be resolved and keep a send receipt and copy of this email as proof. I would suggest also stating that you expect a reply within 14 days as this should give the company adequate time to address the complaint.
2) If you receive no reply to the above or are not satisfied with the response, keep complaining through the companies complaints procedure. Be persistent, it can pay off.
3) If you paid at least £100 of your holiday on your credit card and A1 travel offered you the holiday as a 'package' sold by them, you may be able to claim through your credit card provider under Section 75.
4) Failing the above you could take them to a small claims court. This will restrict you to claiming a maximum of £10,000 if in England and Wales.
If you want to discuss any thing further with me just drop me an message and good luck
Kind Regards,
Stephen.