Need a plumber to unblock kitchen sink in Ireland

Hi there, I’m looking for someone to unblock our kitchen sink. The trap was cleaned recently, but the water drains very slowly and sometimes backs up into the dishwasher. We’d prefer a job that uses safe, standard methods (snaking or plunger) and avoids chemical drain cleaners. Please confirm availability, estimated duration, and any tools you’ll bring. We’re hoping to get this fixed this week if possible and would appreciate a quick diagnostic before any work begins.