double standards

I recently purchased 7 IP65 rating Led floodlights from an online company, received lights ACDC product, Went to ACDC store in Boksburg purchased 2 extra lights. After installing 9 lights in December and a few days of rain lights start to trip power, after inspection found 7 of the 9 lights with visible water/ moisture inside the lights. return to store with lights. they will send one in for assessment, 7lights from online store was also returned, after 3 weeks the replaced the 7 lights with new ones. 2 lights from store still having problems, they trying to say that incorrect cable joint was used resulted in water got sucked into the light via cable. Still waiting on proof that water gets sucked through the cable, so infact the cable is not IP65 rating. Why double standards, Replace 7 but not 2