SEUR are quite possibly the worst delivery company in Spain. They don't deliver when they say, their website 'parcel tracking' system is a joke, often their drivers will call you and ask you to meet them somewhere close - this could be many miles away - or they blatantly lie and say that they tried to deliver and no one was in, when you've waited in all day.
I've met one decent driver for SEUR, and I do feel sorry for the abuse he gets as a driver. SEUR obviously give their drivers too many packages and too little time for them to deliver. As a logistics company, they are failing badly.
I simply do not understand why business use them for deliveries - except that they must be the cheapest.