After some misunderstanding concerning the price, we find a solution.. Anyway Maria was kind, available and flexible with us!
In fact, she gave us a lot of information about the city, she host us in her house (where she lives with her family) that is really big about eight rooms and many bathrooms; She gave us the permission to posticipate our check-out, instead of the morming we left the house int the evening!! Thanks!!
The house is next to Plaza de España, in calle Porvenir, so in the South-Center of the city, so less then 3 kilometres to the train station (Santa Justa) and 3,1-3,2 km to the bus station (Plaza de Armas).
In the next streets (calle Felipe II and calle Diego de Barrera) there many pubs and restaurants where you can eat (quite cheap, ample and good tapas)..
Reassuming, I can say that our stay has been positive.