I recommend patience, and when you finally make contact with CS, stay calm, state your problem and ask what they can do to resolve your problem - calm sweet talk may get you a new sight - keep in mind the CS rep doesn't set policy. As the old saying goes, you attract more flies with honey than vinegar.
As for the recoil of the 740 - it isn't "bad" - it's feisty and accumulative on the range, thus I fire no more that 50 rds. in one session vs. the past 100+. My 740 is my favorite CCW.
Also, welcome to the forum.