Bad service!!!!

I bought a smart y5 fitness tracker online . I got the parcel the next day with a wrong item . I lodged a query with them immediately. I then got communications from some two ladies from their side. The one was asking where they must collect it and i told them the same as where they delivered the wrong item. I am now sitting with the wrong item a week later. No one is giving any update. I feel they are forcing me to use something i did not order. Poor service at its best. I feel like they are taking consumers for granted.