LastMinute.com review: Refund policy

I purchased tickets for my daughters on 20th of July -10 Aug, London to Azerbaijan from lastminute.com and paid £1691.24 with travel insurance which should have enabled me to get a full refund if I changed my mind. When I booked, it said that I could go back and choose to add on the luggage later. However, after the payment was done, I was not able to add on any luggage at all. The message said 'this flight does not have luggage options'. It was impossible to travel without any luggage for such a long journey so I had no other options but to cancel and ask for the money back. With great difficulty, I managed to get credit worth £1388.63 with a reference no [protected].

I used some of my credit (around £100) on 29 Aug-01 sep 2023 London - Copenhagen with booking ref [protected] with 85p extra payment for some reason (it did not let us to complete the booking if I did not pay that).

I still have more than a thousand pounds and I tried to book another ticket but your system did not allow me to use my credits stating that the code was 'not valid'. Why am I not able to use my credits?

I have the copy of all the arrangements for the refund and it is valid till july 2024 .This is not fair. Please refund my money so I can use it when I needed. I will take this matter further if it is not resolved in 14 days