I would appreciate advice as to whether I have a justifiable complaint for compensation against the travel operator.
Sorry for the length but I've tried to get it all in.

In March 2007 my wife booked a half board holiday with Thomson's for mid June; Husband & Wife, grandson aged 15 and grand-daughter aged 9. The travel agent managed to convince her that one room would suffice so she accepted and paid in full with a debit card. When we discussed the possible problems concerning the grandkids sleeping together (cousins) and grand-parents in the same small room, we requested a change from one room to two. Our chosen chosen hotel couldn't accommodate us with two rooms on the same dates so we agreed a change and paid an additional sum of £128.00. My wife also requested rooms on the lower floor for me because I have breathing problems.
When we arrived at the hotel we were disappointed to find that we had been allocated two rooms on different floors. The room on the higher floor was for me and the lower floor was for; my wife, grandson and granddaughter. I complained at that time but couldn't get any satisfaction, so we reluctantly accepted.
We agreed that our grandson take the higher room and we the ground-floor.
When we entered the room we were so disappointed. The heat in the room was unbearable because the air-conditioning was fighting a losing battle with a Jacuzzi next door that was operating all day.
The patio was facing south and the sunblind only covered 3/4 of the window thus increasing the heat in the room. I complained to the management and again demanded another room. This was rejected as they didn't have two rooms together, but the large neon sign outside the hotel advertised room vacancies.
The location of the room in the hotel was;
Next to a Jacuzzi in continual use
Next to a public toilet.
Adjacent to a weight lifting room, (close enough to hear the grunts and groans of a torture chamber)
The public toilet had a window that could be opened into our shower/toilet. The management was aware that we had a nine year old girl sleeping in the room.
Directly over the stage in the lounge/bar which is open 'til 2.00am.
A hotel that is three parts built and is directly opposite our hotel, dust and grit as well as drilling made the patio a 'no go area'
After complaining to the management I told him I was going to complain to the Thomson rep and he just waved me away and invited me to do so. That gesture hardly inspired confidence. Nonetheless, I told the rep and requested a change of hotel if two rooms adjacent to each other couldn't be found by the manager. He come back to me and said if I paid another £50 per person we could go to another hotel. This I rejected.

On the third day we moved into a room next to our grandson and we were glad to get out of the hot-house. However, I must emphasise that three days of our seven day holiday were destroyed because of a poor management decision.

I wrote a draft complaint and gave a copy to the rep, he in turn accepted my reasons for complaint and filled a Customer Report form in of which I have a copy. I also took numerous photographs of all angles.

He told me that he had discussed my situation with his manager and it would assist my complaint, (whatever that means).

What do you think, do I have a reasonable claim for compensation. We paid full brochure price at the Thomson travel shop, nearly £1400 and that was with a free child place. Plus the £128 for the hotel change.

I have entered this hotel in the Benidorm review section: Benidorm plaza