No accountability for defect goods

Bought a call it spring shoe from runwaysale,the shoe came apart after the first use. Definitely seems like a manufacturing defect or issue. I complained to Call it spring as it's their brand and instead they said they can't do anything about it. Shocking that no accountability is taken for their brand and a show they produce. They asked me to take it up with Runwaysale but my point is they aren't the manufacturer they just a reseller.