Have a fantastic time.
You are correct in that the calas park is sea front however if you wanted to go to the beach you would have walk along the cliff walk and down the steps. The Eurocalas is set further back and to get to the beach you would walk via the road or take the train. You can still see the sea and have sea view rooms at the eurocalas. I appreciate that it was not the hotel you wanted and I would still fight this but go on your holiday and have a lovely time.
The resort transfer to calas is about 1-3hrs on the bus depending your drop offs. We were lucky and got to our hotel within one hour but on the return leg we were on the bus for 3 hours!!. If you can book a private taxi then you will be at your hotel within an hour.