Good alarm company in Lorca?

Any reason why not Securitas Direct / Verisure? 

Myself and most of my neighbours have their systems and have not had any problems...

We had them for many years in a previous house. Apart from overselling and being expensive, in our opinion, probably because the salesmen are on commission,  when we moved house they were an absolute nightmare. It took months to get them to cancel the contract. They have a legal obligation to do so, but in the end we were advised to threaten to report them to the police. That was the only thing that worked.