Poor service

Poor service -They don't even deserve the 1 star.I ordered a sneaker online, but the wrong size was delivered to me.I sent multiple emails, but no one cares to respond in time. They respond after 3 days with no resolution. Even now, I'm still waiting for them to deliver the correct size but they tell me about SLA, which does not make sense because they made a mistake in the first place. Agents at the call centre do not care