Tear in bottom of both boots 4 months after buying

I bought these boots in November 2018 and they worked fine for 4 months (though their sizes run very large - I ordered a size 8 and it feels like a 10) until today. I put them on this morning and by the time I got to work (20 mins later) I noticed that both of my feet felt wet. I checked to see, thinking that maybe some extra rain got inside the shoes because they are big and a bit wide on my feet but I realized that both boots have a tear on the heel side (see picture). I have no idea how this happened because I don't wear them often. This is very disappointing as I only bought these shoes 4 months ago! My last rain boots lasted me almost 10 years without ever getting my feet wet like these. I would not recommend these shoes and I will not buy this brand again.

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