Aeromadrid was closed some months ago, more than one year I would say.
If you want to rent a PA28, I reccomend with no doubt "Club de Vuelo TAS". You can take one Pa-28-181 with a decent 180hp engine for a bit less than 150 euros wet (with instructor for 20 euros more).
Their web is
here. Only in spanish, but you can give them a call (+34 913 094 298) and they will attend you in english.
Take into account that you need to pay 30 euros per month as 'membership fee', but if you're going to rent several hours this fee get diluted and it is still a very good price per flight hour .