The rudest place I've ever been in is the minimarket near the Seril, it's name starts with an O and is on the right hand side of the road that heads on down to Seaside Villas. It faces directly across to the side road that has Kum City Beach Park at the end of it.
The most miserable shopkeeper on the planet. It was quite literally once OK, twice maybe and realising it wasn't a one off, "Third time definatly go somewhere else!!"