WORN OUT AFTER ONLY TWO WEEKS

I bought this pair of shoes two weeks ago and see what happened to the sole of the right shoe.  Either it is poorly made or I have worn it thin.  I bought it for RM49.90 from the XES store.
Since it is relatively new and the upper part was still in good condition, I decided to send it to the cobbler to see what he could do.  Luckily for me, he said the soles could be changed.  He charged me RM10 for both the soles.