Incorrect item delivered 3 times with no feedback

I bought a 200/300 rug but received a 160/230 delivered 3 times, I've been promised that this situation will be corrected but no one has made contact since. I've tried to email but receive no feedback and when calling in I'm promised that someone will investigate but nothing happens. I'm now sitting with the incorrect item. This is truly pathetic service for items that are fully paid