Service Wifi providers in El Cotillo

If you have the fiber arriving in the block you can contact multiple providers to see their offers.
You can also look up on their website if they provide fiber there or contact them by messenger, that's often possible in English too if you're still learning Spanish ;) 
Or simply go out and ask some neighbours who they're using.

I live in Parque Holandés and the best price here is Movistar.
Fiber was only installed recently last March and a lot of the neighbours use them, I hear they are happy with them.
Only one small problem for me, there are more installations than anticipated so there are not enough "slots" in the main fiber installation so a special technician has to come over what takes long now...
My neighbours ordered their connection 6th of June, mine was 27th of July and still waiting...
With a bit of luck things may be going forwards now as I heard from the president a technician came by last Thursday.
Movistar wasn't aware of this Friday, I hope we can get our installation this week.

Hope you won't have the same problem, I solved it by buying a prepaid Vodafone card with lots of data and promotion until end of September that doubled the data for free and a 4G router and still using this, it works but it isn't fiber.

There's a solution to everything :)

Thank you for your reply.  We have sorted it.  A very helpful chap, Gary from Servifone  was very efficient and it is all being connected today - fingers crossed.