MORE than 30 vendors from Phnom Penh’s Heng Ly Market protested in front of City Hall yesterday, calling for authorities to intervene in a dispute with a market owner who has raised some rents by almost 50 percent. About 100 vendors protested against the rent increase twice last month after the market’s owner announced he would be raising prices for about 800 stallholders. Ngiv Rith, a vendor representative, said yesterday that a request filed to the prime minister’s cabinet on January 3 had been referred to municipal officials.