IER SIMCARD , SAMSUNG A50

I worked in a bar over some period last year in Tenerife, and while on a shift a blue samsung phone was found very late, no one claimed it or up to 3 months so i took it home and I have been trying to get into the phone since to ring either family or the owner, i have never lost a phone and imagine it's awful , I really want to get it back with the owner however as I'm living in tenerife the phone network in Ireland it is registered is very hard to get a hold of ! , its a long shot but I really want to get this phone back to the owner incase of any sentimental value ect; the SIM in blocked but we can confirm some other way , my help please appreciated