Poor Qaulity

I Purchased a pair of Havaianas because I heard that it will last for a very long time unlike cheaper flip flips that wear off. So I bought a pair &was very happy with the look and feel however after having it for a few days the \Y\" shaped rubber popped out, I assumed that because it allowed me to insert it back it would be ok, I have the pair for 1 year and now I cant even walk very fast because it pops out all the time, and its become dangerous because im pregnant and often find myself tripping because the shoe pops out. im highly disappointed because I paid over R300 for a pair of flip flops I expected to be reliable and last long but this was not the case."