Price rip-off

I went to Dischem today to buy Alien perfume. I bought the 30ml refillable bottle and paid R1265 for the bottle. I recalled seeing the perfume being advertised at a price of R885 and decided to double check on the Dischem website when we got home. The price of R885 was for a non refillable bottle which I did not even see in the store today, but to my surprise the refillable 30ml is advertised for a price of R1070 on the Dischem site? Quite a difference from which I paid. How is this possible?? !!