Hi Janet
My family and I have been repeatedly returning to Arillas for many years and can assure you that with a very few exceptions, you will not be kept awake at night because of noise, Arillas just isn’t that type of resort.
We have stayed at Irenes Apts and they were beautiful, which of course is little consolation as you have unfortunately missed out. You could try the Horizon hotel, which is right on the seafront and rooms are all air con with fab views. They have fridges as well and some have a kitchenett I believe.
We have stayed for the past year and are going this year to the Marinaki apts which again are on the beach front in an idyllic setting. (contact via the Marina Hotel).
There are also some lovely little studios tucked behind the Portifino which my parents stayed at a few years ago, but I cant remember the name. Perhaps someone else on here can help? Are they ‘makris’? that rings a bell. Hope this helps a little and that you get sorted.