Gentek Windows — BAD GENTEK Windows

Bad Gentek Windows!!!
We installed Gentek windows in the spring of 2011. One the glass was crack by itself last March. The temperature was -13 degree Celsius. I called M&M Windows Co. Inc. who installed the Gentek windows for us. The sales person explained that the temperature was too cold. Our house was an old house. The cold pressure made the wall change shape and pushed the window unevenly, eventually it cracked the window and the glass broke. Eh? Did it make any sense to you? The cost to replace the window was $500. Today, Temperature is -17 degree Celsius. 5 out of 21 windows has frosted (snow flakes) inside the glasses, yes, the frost are between the glasses. This is ridiculous.
Please advise if you have any suggestions.