"The Vamps, Somebody to You (EP) - No. 192 - The U.K. pop band's album earns the distinction of the biggest second-week drop on the chart ever for a top 10-debuting album, falling 182 spots (and also down 90 percent in sales)."
They will happen, most likely. They just need a proper hit. The fact alone that their EP debuted in Top 10 without much major promotion or a hit is amazing. Give them some time and some chances.