ibis budget Concarneau

We had booked a standard room + bunk bed with as per the booking email was guaranteed. When we arrived we found that the main door to our room had a broken lock (anybody could come in) and the bunk bed was missing. We talked to the night porter (the only staff that was there at the time) and asked for another room with a bunk bed and a working lock but there was none available. He offered us a twin room instead with no extra bed for our 3 years old which ended up sleeping on the floor on a duvet and a bunch of bathroom Towels. We choosed Ibis based on the fact that the room we had booked was guaranteed and can't tell you how dissspointed we were to go through all that hassle late at night. We talked to the staff the next morning and explained the sitaution and our unsatisfaction to them. They were very unhelpful and we were told there is nothing they can do. Then, We call the uk customer service and still have not heard back from the complain we have made last Friday. Overall we are very unhappy with how things were handle from the beginning and are hoping to get an explaination from ibis.