Hi there, sorry to hear about your experiences. We had a similar issue a few years back with machine noise keeping us awake. We were eventually given a change or room after we took our pillows & covers & set up camp on the chairs in the reception area.
Not sure if the stricter 'good behavio(u)r' rules would risk them being debarked, but it might be worth threatening to do the same & see what is said then.
Also if you can record the noise, say on a cam-corder, & demonstrate it to the chief purser, saying you will take it to your solicitor upon your return to sue for compensation, it may encourage them to do something.
Good luck for a successful resolution.
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