I didn't think there was fibre in Lo Crispin? - logically if there was would expect speeds with a minimum of 20+ it may just be a standard landline, at 10Mbps, would suspect to be the case. They are probably just piggybacking Telefonicas landline. If it is fibre at 10Mbps, it is the slowest fibre i've ever seen!
We install on behalf of Telitec for the internet (we run our own TV services), the most they can offer 8Mbps for €19.99 per month+ IVA, with an install of €99. Not the fastest, but reasonable and price not too bad, they also do 4Mbps for €9.99 + IVA per month and you can use for 6 months out of 12, making a pretty cheap option for a holiday home.
Paul
http://www.televisiontechnology.eu966783944