Online order mess up

I ordered 2 x shorts size 38 and 2 x 2XL t-shirts online from Wildebees. I shipped the package to my father in law in PTA and from there shipped the package to Western Australia. I recieved the package on Saturday with great exitement but was uterly disgusted when I fit the 1st short which is a 36 and not a 38 as Ive ordered,the rest of my clothing is correct. Now Ive wasted R420 for the short and a hell of a lot of money shipping it to Australia. Wildebees have lost a client and I will spread this far and wide.