Thanks for all your answers, i'm so amazed by your engagement in this matter :)
Just to clarify how the story went, and what is the outcome.
We have been a little nervous about what the hotel will decide, and a long time has passed since we had written our email to them. Fortunately after about a week we had been notified that the hotel has the right to change its rates when the hotel manager decides that the demand is high or low. They were sorry that we feel bad about our reservation and have offered us a free room upgrade.
This however was not what we wanted to be honest, so we have replied them (in a more organised matter) counting out every issue that we found with our reservation (such as missleading information about the number of rooms, no information about the possibility to change rates, missleading promotion percentage). We have also taken a more private approach, requesting their indulgence, and underlining that it is just their good will in that matter to make our honeymoon less nervous and more enjoyable by agreeing to cancel the reservation and letting us add one more day at the current rates.
We have however accepted the fact that we won't be most probably able to do anything here, and we will be stuck with the (much higher) price only to be "cheered" with the higher standard of the room (garden view vs. ocean view).
To our surprise after a few days (yesterday) we had our reservation canceled. A few moments later we have been sent an email from hotels customer service with a formal apology for all the troubles we have gone through :) We then proceeded to book another room in the hotel at a lower rate with an extended period. To our next surprise we have been given additional discount for the room, so we have paid a lot less than we ever expected.
#LovingMelia :)
LovingMelia :)
Tldr - The hotel offered us a free upgrade, but we rejected it, and wrote (more organised) reply. After a few days they hotel have canceled our reservation cost free and gave us an additional discount.