Entro - yes, I would report this to capital police. This looks like planned, systematic attempt to rip off customers. Happens a lot in establishments in Thailand, Philippines etc. (in the touristy places). When you point it out, it's always "oh, so sorry, honest mistake etc." It's called bill padding. Easy to overlook when you have had a few drinks.

Disappointed to see it happen here to. It might just be QR. 16 for you, but at the end of the day, those dishonest staff would have skimmed off hundreds in total.

Even with a conservative estimate of overcharging 10 customers a day with say Qr. 10 will make that waiter richer by Qr. 3000 at the end of the month!!!

A 5* hotel charging you Qr. 40 for a pepsi is not the same. I'm sure that price is listed on their menu and also appears on their bill with ++taxes.