I think this must be the first negative thing i've read about arrillas, and yes its a bit worrying, yes its upsetting and could put a bit of a downer on your well earned hols; but that said, the locals are simply trying to earn an honest crust, and if the older Greek women are anything like Turkish women, you have the language barrier as well as the fiery temperament, which most of the time lies dormant! I personally would have found a member of staff who speaks fair english, explained my intentions and hopefully have avoided a debate (ever the diplomat!) Failing that, I'd have moved to pastures new; if the management condones hassling you for business, trust me, they'll miss you before you miss them!
To me, this would be a minor hiccup in proceedings, especially after a 5 star all inclusive in Turkey last year, where my hubby had an ear infection from day 2, I had a bout of the Turkey trots, and both my kids ended up on drips! One due to gastroentoritis and the other with an infection in both ears; Oh yes, and I ended up on antibiotics due to an ear problem too. Most of this happened in week 2, leaving us wondering if we'd be fit to fly home - I couldn't get back to Blighty quick enough - so some stroppy Greek lady would be a walk in the park this year!
All said, i'll beware of the drinks lady at the Mirage!