Boots purchases not impressed

On Monday i bought a paid of boots from the branch in cresta. Loved them. When i fitted them on Tuesday i realized that they were two wrong sizes and both left footed. The cashier (Daniel) did not even notice this even after checking them. Instead of me tracking back to Cresta i went to the branch closest to me Melrose arch(on 09.06.15) and inquired if i could exchange them and they agreed stating no problem we can just send them back on your behalf to cresta. Today when i wanted to return them and get a different pair it was a different story. No i have to go to cresta to return the boots which is what i wanted to avoid in the first place when i inquired yesterday. I asked if it is possible or should i go to the branch. I don't have time to waste and it was wasted i am very disappointed as that is the reason i asked. Not impressed